Write down the solution for this math problem: Solve -68*u + 26074 = 26686 for u.
answer: -9

Write down the solution for this math problem: Solve -1247 - 4064 = 198*o + 2411 for o.
answer: -39

Write down the solution for this math problem: Solve -203*w + 260*w = 171 for w.
answer: 3

Write down the solution for this math problem: Solve -184 + 4 = -62*o + 80*o for o.
answer:
-10