Write down the solution for this math problem: Solve 80 = z + 77 for z.
answer: 3

Write down the solution for this math problem: Solve -8*a + 370 - 488 = -334 for a.
answer: 27

Write down the solution for this math problem: Solve 235*a = 727*a + 14760 for a.
answer: -30

Write down the solution for this math problem: Solve 10*b + 5 = 55 for b.
answer:
5