Write down the solution for this math problem: Solve 25137 - 98730 = 1989*w for w.
answer: -37

Write down the solution for this math problem: Solve -30*a - 554 = -914 for a.
answer: 12

Write down the solution for this math problem: Solve -2*s = 11*s - 65 for s.
answer: 5

Write down the solution for this math problem: Solve 38*x = 43*x - 15 for x.
answer:
3