Write down the solution for this math problem: Solve 115*s - 59*s + 599 = -136*s + 2711 for s.
answer: 11

Write down the solution for this math problem: Solve 154 = -385*s - 161 + 1470 for s.
answer: 3

Write down the solution for this math problem: Solve -1910*r + 1894*r + 304 = 0 for r.
answer: 19

Write down the solution for this math problem: Solve -389*d + 390*d - 4 = 0 for d.
answer:
4