Question

Solve the following equation 7a-9=12​

Answer 1

The value of a is 3.

Explanation:

First, you have to add 9 to both sides to eliminate -9 on the left side :

`7a - 9 = 12`

`7a - 9 + 9 = 12 + 9`

`7a = 21`

In order, to find a, you have to divide it by 7 :

`a = 21 / 7`

`a = 3`

Answer 2

7a-9=12

Add 9 to both sides:

7a= 21

Divide both sides by7

A= 3