Write down the solution for this math problem: Solve 0 = -6*s + 8*s + 2 for s.
answer: -1

Write down the solution for this math problem: Solve 2*f - 7*f = -752 + 712 for f.
answer: 8

Write down the solution for this math problem: Solve 74136 = 4496*h + 4157*h - 2475*h for h.
answer: 12

Write down the solution for this math problem: Solve 816*r + 3042*r + 4513*r = 108823 for r.
answer:
13