Write down the solution for this math problem: Solve -193*x + 16605 = 153*x - 110*x + 169*x for x.
answer: 41

Write down the solution for this math problem: Solve -7*i + 515 = 15*i - 456 + 25 for i.
answer: 43

Write down the solution for this math problem: Solve 821 = -167*q - 5080 + 12748 for q.
answer: 41

Write down the solution for this math problem: Solve -21*f + 84 = -42 for f.
answer:
6