Question

8(-4 + a) = 12a

Explanation:

Step1: Expand left-hand side

$8\times(-4) + 8\times a = 12a$
$-32 + 8a = 12a$

Step2: Isolate variable terms

$-32 = 12a - 8a$
$-32 = 4a$

Step3: Solve for $a$

$a = \frac{-32}{4}$

Answer:

$a = -8$