Write down the solution for this math problem: Solve -643 = -89*u + 158 for u.
answer: 9

Write down the solution for this math problem: Solve 0 = 5954*m - 161230 - 166240 for m.
answer: 55

Write down the solution for this math problem: Solve 12*z + 4*z = 144 for z.
answer: 9

Write down the solution for this math problem: Solve -1210*j = -1169*j + 1107 for j.
answer:
-27