Answer:
d = -16
Step-by-step explanation:
Step 1: Write equation
89 = -5d + 9
Step 2: Solve for d
Subtract 9 on both sides: 80 = -5d
Divide both sides by -5: -16 = d
Step 3: Check
Plug in x to verify if it's a solution.
89 = -5(-16) + 9
89 = 80 + 9
89 = 89
