Write down the solution for this math problem: Solve -7*x - 2 = -9 for x.
answer: 1

Write down the solution for this math problem: Solve -2*j + 388 - 396 = 0 for j.
answer: -4

Write down the solution for this math problem: Solve 19960*c + 227 = 9887*c + 9980*c - 145 for c.
answer: -4

Write down the solution for this math problem: Solve 0 = 74*s + 140*s - 3638 for s.
answer:
17