Write down the solution for this math problem: Solve -x + 3 - 6 = 0 for x.
answer: -3

Write down the solution for this math problem: Solve -5073 = 15*x + 690*x + 1977 for x.
answer: -10

Write down the solution for this math problem: Solve -53788 = -1760*h - 4508 for h.
answer: 28

Write down the solution for this math problem: Solve 15*x - 20*x = 49*x - 810 for x.
answer:
15