Write down the solution for this math problem: Solve 38*u + 448 - 77 + 921 = 0 for u.
answer: -34

Write down the solution for this math problem: Solve -222143*j + 84 = -222149*j for j.
answer: -14

Write down the solution for this math problem: Solve 766*r + 70200 = -1034*r for r.
answer: -39

Write down the solution for this math problem: Solve -84*o + 42416 = 1156*o - 276*o for o.
answer:
44