Write down the solution for this math problem: Solve s - 40 + 44 = 0 for s.
answer: -4

Write down the solution for this math problem: Solve -1914*r - 191936 = -276*r + 1385*r + 122456 for r.
answer: -104

Write down the solution for this math problem: Solve 77*u + 1580 = -4921 + 341 for u.
answer: -80

Write down the solution for this math problem: Solve 1219392 = 36513*r - 23811*r for r.
answer:
96