Question

12\
7\
12x - 4 = 4x + 20

Explanation:

Step1: Isolate x terms on left

$12x - 4x - 4 = 20$

Step2: Simplify x terms

$8x - 4 = 20$

Step3: Isolate constant terms on right

$8x = 20 + 4$

Step4: Simplify constant terms

$8x = 24$

Step5: Solve for x

$x = \frac{24}{8}$

Answer:

$x = 3$