English

If 5 is Subtracted from Three Times a Number, the Result is 16. Find the Number. - Mathematics

Advertisements
Advertisements

Question

If 5 is subtracted from three times a number, the result is 16. Find the number.

Sum

Solution

Let the number = x

According to the condition,

3x – 5 = 16

⇒ 3x = 16 + 5

⇒ 3x = 21

⇒ x = `21/3`

⇒ x = 7

∴The number = 7

shaalaa.com
Simple Linear Equations in One Variable
  Is there an error in this question or solution?
Chapter 12: Simple Linear Equations (Including Word Problems) - Exercise 12 (D)

APPEARS IN

Selina Concise Mathematics [English] Class 7 ICSE
Chapter 12 Simple Linear Equations (Including Word Problems)
Exercise 12 (D) | Q 14

RELATED QUESTIONS

Solve the following equation:

3(x + 1) = 12 + 4(x - 1)


Solve the following equation:

5 – d= 12


Solve the following equation:

`"y" + 5 = 8 1/4`


Solve the following equation:

`"p" - 12 = 2 2/3`


Solve the following equation:

1.3b = 39


Solve the following equation:

2a – 3 =5


Solve the following equation:

3p – 1 = 8


Solve: `"x"/3 - "x"/4 = 2`


Solve: y + 20% of y = 18


Solve: `("x" - 1)/5 - "x"/3 = 1 - ("x" - 2)/2`


Solve: 2x + 20% of x = 12.1


Solve the following equation for the unknown: `(1)/(2)"p" + (3)/(4)"p"` = p - 3


Solve the following equations for the unknown: `(7)/(x - 2) - (5)/(3)` = 3, x ≠ 2


Solve the following equations: a(x - b) -x (x - 2b) = x + 5(x - b)


Find the number which, when added to its half, gives 60.


A police car is ordered to chase a speeding car which is 5 km ahead and is travelling at an average speed of 80 km/h. The police car is running at an average speed of 100 km/h. How long it take for the police car to overtake the speeding car?


In a factory a worker is paid Rs. 20 per hour for normal work and double the rate for overtime work. If he worked for 56 hours in a week, find the number of hours of his normal work if he receives Rs. 1440 in all.


A boy is now one-third as old as his father. Twelve years hence he will be half as old as his father. Determine the present ages of the boy and that of his father.


A and B together can complete a piece of work in 6 days. A can do it alone in 10 days. Find the number of days in which B alone can do the work.


What number decreased by 18% of itself gives 1599?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×