Write down the solution for this math problem: Solve -58*u + 135 = -31*u for u.
answer: 5

Write down the solution for this math problem: Solve -5*z = 3*z + 8 for z.
answer: -1

Write down the solution for this math problem: Solve 62*l - 284 = 26 for l.
answer: 5

Write down the solution for this math problem: Solve -80*k - 792 = 8*k for k.
answer:
-9