Write down the solution for this math problem: Solve 45*x = 47*x + 8 for x.
answer: -4

Write down the solution for this math problem: Solve 787670*w + 51102 = 786668*w for w.
answer: -51

Write down the solution for this math problem: Solve 6194*a - 6161*a + 99 = 0 for a.
answer: -3

Write down the solution for this math problem: Solve -176 = 31*q + 13*q for q.
answer:
-4