Write down the solution for this math problem: Solve 0 = 61*j + 135*j - 2815 - 1693 for j.
answer: 23

Write down the solution for this math problem: Solve 198 = 412*q - 306*q - 172*q for q.
answer: -3

Write down the solution for this math problem: Solve 537*c + 30212 + 87664 = 3216*c for c.
answer: 44

Write down the solution for this math problem: Solve 0*a - 8 = -4*a for a.
answer:
2