Solve the following equation 7a-9=12

7a-9=12

Add 9 to both sides:

7a= 21

Divide both sides by7

A= 3

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 :

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

+25 = x

step-by-step explanation:

here x is the hypotenuse of a right triangle whose legs are 7 and 24.   by the pythagorean theorem, 7² + 24² must equal x²:

x² = 49 + 576 = 625.   thus, x = +√625 = +25 = x

i dont have an answer

step-by-step explanation: