NCERT solutions for Mathematics [English] Class 7 chapter 4 - Simple Equations [Latest edition]

Complete the last column of the table.

Complete the last column of the table.

Complete the last column of the table.

Complete the last column of the table.

Complete the last column of the table.

Complete the last column of the table.

Complete the last column of the table.

Complete the last column of the table.

Complete the last column of the table.

Complete the last column of the table.

Complete the last column of the table.

Check whether the value given in the bracket is a solution to the given equation or not:

n + 5 = 19 (n = 1)

Check whether the value given in the bracket is a solution to the given equation or not:

7n + 5 = 19 (n = − 2)

Check whether the value given in the bracket is a solution to the given equation or not:

7n + 5 = 19 (n = 2)

Check whether the value given in the bracket is a solution to the given equation or not:

4p − 3 = 13 (p = 1)

Check whether the value given in the bracket is a solution to the given equation or not:

4p − 3 = 13 (p = − 4)

Check whether the value given in the bracket is a solution to the given equation or not:

4p − 3 = 13 (p = 0)

Solve the following equation by trial and error method:

5p + 2 = 17

Solve the following equation by trial and error method:

3m - 14 = 4

Write equation for the following statement.

The sum of numbers x and 4 is 9.

Write equation for the following statement:

2 subtracted from y is 8.

Write equation for the following statement:

Ten times a is 70.

Write equation for the following statement:

The number b divided by 5 gives 6.

Write equation for the following statement:

Three-fourth of t is 15.

Write equation for the following statement:

Seven times m plus 7 gets you 77.

Write equation for the following statement:

One-fourth of a number x minus 4 gives 4.

Write equation for the following statement:

If you take away 6 from 6 times y, you get 60.

Write equation for the following statement:

If you add 3 to one-third of z, you get 30.

Write the given equation in statement form:

p + 4 = 15

Write the given equation in statement form:

m − 7 = 3

Write the given equation in statement form:

2m = 7

Write the given equation in statement form:

`m/5 = 3` 

Write the given equation in statement form:

`(3m)/5 = 6`

Write the given equation in statement form:

3p + 4 = 25

Write the given equation in statement form:

4p − 2 = 18

Write the given equation in statement form:

`p/2` + 2 = 8

Set up an equation in the following case:

Irfan says that he has 7 marbles more than five times the marbles Parmit has. Irfan has 37 marbles. (Take m to be the number of Parmit’s marbles.)

Set up an equation in the following case:

Laxmi’s father is 49 years old. He is 4 years older than three times Laxmi’s age. (Take Laxmi’s age to be y years.)

Set up an equation in the following case:

The teacher tells the class that the highest marks obtained by a student in her class is twice the lowest marks plus 7. The highest score is 87. (Take the lowest score to be l.)

Set up an equation in the following case:

In an isosceles triangle, the vertex angle is twice either base angle. (Let the base angle be b in degrees. Remember that the sum of angles of a triangle is 180 degrees.)

Give first the step you will use to separate the variable and then solve the equation:

x - 1 = 0

Give first the step you will use to separate the variable and then solve the equation:

x + 1 = 0

Give first the step you will use to separate the variable and then solve the equation:

x - 1 = 5

Give first the step you will use to separate the variable and then solve the equation:

x + 6 = 2

Give first the step you will use to separate the variable and then solve the equation:

y − 4 = − 7

Give first the step you will use to separate the variable and then solve the equation:

y − 4 = 4

Give first the step you will use to separate the variable and then solve the equation:

y + 4 = 4

Give first the step you will use to separate the variable and then solve the equation:

y + 4 = -4

Give first the step you will use to separate the variable and then solve the equation:

3l = 42

Give first the step you will use to separate the variable and then solve the equation:

`b/2 = 6`

Give first the step you will use to separate the variable and then solve the equation:

`p/7 = 4`

Give first the step you will use to separate the variable and then solve the equation:

4x = 25

Give first the step you will use to separate the variable and then solve the equation:

8y = 36

Give first the step you will use to separate the variable and then solve the equation:

`z/3 = 5/4`

Give first the step you will use to separate the variable and then solve the equation:

`a/5 = 7/15`

Give first the step you will use to separate the variable and then solve the equation:

20t = -10

Give the steps you will use to separate the variable and then solve the equation:

3n − 2 = 46

Give the steps you will use to separate the variable and then solve the equation:

5m + 7 = 17

Give the steps you will use to separate the variable and then solve the equation:

`(20p)/3 = 40`

Give the steps you will use to separate the variable and then solve the equation:

`(3p)/10 = 6`

Solve the following equation:

10p = 100

Solve the following equation:

10p + 10 = 100

Solve the following equation:

`p/4 = 5`

Solve the following equation:

`(-p)/3 = 5`

Solve the following equation:

`(3p)/4 = 6`

Solve the following equation:

3s = − 9

Solve the following equation:

3s + 12 = 0

Solve the following equation:

3s = 0

Solve the following equation:

2q = 6

Solve the following equation:

2q − 6 = 0

Solve the following equation:

2q + 6 = 0

Solve the following equation:

2q + 6 = 12

Set up equation and solve them to find the unknown number in the following case:

Add 4 to eight times a number; you get 60.

Set up equation and solve them to find the unknown number in the following case:

One-fifth of a number minus 4 gives 3.

Set up equation and solve them to find the unknown number in the following case:

If I take three-fourths of a number and add 3 to it, I get 21.

Set up equation and solve them to find the unknown number in the following case:

When I subtracted 11 from twice a number, the result was 15.

Set up equation and solve them to find the unknown number in the following case:

Munna subtracts thrice the number of notebooks he has from 50, he finds the result to be 8.

Set up equation and solve them to find the unknown number in the following case:

Ibenhal thinks of a number. If she adds 19 to it and divides the sum by 5, she will get 8.

Set up equation and solve them to find the unknown number in the following case:

Anwar thinks of a number. If he takes away 7 from `5/2` of the number, the result is 23.

The teacher tells the class that the highest marks obtained by a student in her class is twice the lowest marks plus 7. The highest score is 87. What is the lowest score?

In an isosceles triangle, the base angles are equal. The vertex angle is 40°. What are the base angles of the triangle? (Remember, the sum of three angles of a triangle is 180°).

Sachin scored twice as many runs as Rahul. Together, their runs fell two short of a double century. How many runs did each one score?

Irfan says that he has 7 marbles more than five times the marbles Parmit has. Irfan has 37 marbles. How many marbles does Parmit have?

Laxmi’s father is 49 years old. He is 4 years older than three times Laxmi’s age. What is Laxmi’s age?

People of Sundargram planted trees in the village garden. Some of the trees were fruit trees. The number of non-fruit trees was two more than three times the number of fruit trees. What was the number of fruit trees planted if the number of non-fruit trees planted was 77?

Solve the following riddle:

I am a number,

Tell my identity!

Take me seven times over

And add a fifty!

To reach a triple century

You still need forty!