Answer:
x = 12
Step-by-step explanation:
Step 1: Define
f(x) = 4x + 6
f(x) = 54
Step 2: Substitute variables
54 = 4x + 6
Step 3: Solve for x
Subtract 6 on both sides: 48 = 4x
Divide both sides by 4: 12 = x
Step 4: Check
Plug in x to verify it is a solution.
f(12) = 4(12) + 6
f(12) = 48 + 6
f(12) = 54
