Write down the solution for this math problem: Solve -372*x = -381*x - 72 for x.
answer: -8

Write down the solution for this math problem: Solve 0 = 8*j + 271 - 223 for j.
answer: -6

Write down the solution for this math problem: Solve -9*o + 226 - 620 = -286 for o.
answer: -12

Write down the solution for this math problem: Solve -2639*o + 2423*o + 2808 = 0 for o.
answer:
13