Write down the solution for this math problem: Solve 6862*t - 6831*t + 613 = 210 for t.
answer: -13

Write down the solution for this math problem: Solve -309*z + 22*z - 3379 = 2400 + 1970 for z.
answer: -27

Write down the solution for this math problem: Solve 0 = -8713*b + 7835*b + 43022 for b.
answer: 49

Write down the solution for this math problem: Solve 28693*n = 29723*n + 84460 for n.
answer:
-82