Question

Solve the following equation 7a-9=12​

Answer 1

Answer:

The value of a is 3.

Step-by-step 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 :

$a = 21 \div 7$

$a = 3$

Answer 2

7a-9=12

Add 9 to both sides:

7a= 21

Divide both sides by7

A= 3