Write down the solution for this math problem: Solve 13492*w = 13398*w - 1410 for w.
answer: -15

Write down the solution for this math problem: Solve 0 = -5*n - 3*n + 24 for n.
answer: 3

Write down the solution for this math problem: Solve 0 = 507*s - 368103 + 398523 for s.
answer: -60

Write down the solution for this math problem: Solve -39*a + 7939 = 7705 for a.
answer:
6