Write down the solution for this math problem: Solve 0 = -57*b + 63*b - 18 for b.
answer: 3

Write down the solution for this math problem: Solve 6*k = -146 + 122 for k.
answer: -4

Write down the solution for this math problem: Solve -155*r = -217*r + 1178 for r.
answer: 19

Write down the solution for this math problem: Solve -19536 = -45*q - 18906 for q.
answer:
14