Question

What is the value of x in the equation, 70 = 12 + 9x – 2(x + 6)

Answer 1

x = 10

Explanation:

In this question, we would be solving for the x-variable.

Solve:

70 = 12 + 9x - 2(x + 6)

Use the "distributive property":

70 = 12 + 9x - 2x - 12

Combine like terms:

70 = 12 + 7x - 12

70 = 7x

Divide both sides by 7 to get the variable "x" by itself:

10 = x

Answer 2

Solution :-

➩ 70 = 12 + 9x - 2 ( x + 6 )

➩ 70 = 12 + 9x - 2x - 12

➩ 70 = 0 + 7x

➩ 70 = 7x

Here we can use 2 methods

Methods :-

1. Trial and error method :- By adding,subtracting , multiplying or dividing the same variable or constant on LHS & RHS
2. Transposing :- by transposing a term from LHS to RHS or RHS to LHS

• Trial and error

By dividing with 7 on both sides

➩ 70/7 = 7x/7

➩ x = 10

• Transposing

By transposing 7 from RHS. to LHS

➩ 70/7 = x

➩ x = 10

Hence , x = 10