Write down the solution for this math problem: Solve -7*q - 1 + 15 = -77 for q.
answer: 13

Write down the solution for this math problem: Solve -77*x + 11*x = -858 for x.
answer: 13

Write down the solution for this math problem: Solve 0 = -3*u - 20 + 14 for u.
answer: -2

Write down the solution for this math problem: Solve 4*q - 3 = 17 for q.
answer:
5