giving 100 points and 4 brainlist if right

Answer:
x = -2
Step-by-step explanation:
Step 1: Define
q(x) = 1/2x - 3
q(x) = -4
Step 2: Substitute and Evaluate
-4 = 1/2x - 3
-1 = 1/2x
-2 = x
x = -2
Step 3: Check
q(-2) = 1/2(-2) - 3
q(-2) = -1 - 3
q(-2) = -4