Write down the solution for this math problem: Solve -74*k - 17978 + 17830 = 0 for k.
answer: -2

Write down the solution for this math problem: Solve -3*i - 86 + 80 = 0 for i.
answer: -2

Write down the solution for this math problem: Solve 0 = -457*s + 1362*s - 10860 for s.
answer: 12

Write down the solution for this math problem: Solve 0 = -4*d + 45 - 29 for d.
answer:
4