Advertisements
Advertisements
Question
State which of the following are equations (with a variable). Give reason for your answer. Identify the variable from the equations with a variable.
5 × 4 − 8 = 2x
Solution
An equation with variable x
APPEARS IN
RELATED QUESTIONS
Complete the last column of the table.
Equation | Value | Say, whether the Equation is Satisfied. (Yes/No) |
x + 3 = 0 | x = 3 |
Write equation for the following statement:
One-fourth of a number x minus 4 gives 4.
Write the given equation in statement form:
m − 7 = 3
Verify by substitution that the root of 3 + 2x = 9 is x = 3.
A bag contains 25-paisa and 50-paisa coins whose total value is Rs 30. If the number of 25-paisa coins is four times that of 50-paisa coins, find the number of each type of coins.
Lalit earns Rs x per day and spends Rs y per day. How much does he save in 30 days?
A shopkeeper sells mangoes in two types of boxes, one small and one large. A large box contains as many as 8 small boxes plus 4 loose mangoes. Set up an equation which gives the number of mangoes in each small box. The number of mangoes in a large box is given to be 100.
The shifting of a number from one side of an equation to other is called transposition
Change the following statements using expressions into statements in ordinary language.
(For example, Given Salim scores r runs in a cricket match, Nalin scores (r + 15) runs. In ordinary language − Nalin scores 15 runs more than Salim.)
Tony puts q marbles on the table. He has 8 q marbles in his box.
x exceeds 3 by 7, can be represented as ______.