Write down the solution for this math problem: Solve 7747*c = -8018 + 24674 + 6585 for c.
answer: 3

Write down the solution for this math problem: Solve 13*w = 9*w + 20 for w.
answer: 5

Write down the solution for this math problem: Solve -39*d - 556 = -104*d + 354 for d.
answer: 14

Write down the solution for this math problem: Solve -3146822 = 144*x - 3143798 for x.
answer:
-21