Write down the solution for this math problem: Solve 0 = 96*r - 110*r - 42 for r.
answer: -3

Write down the solution for this math problem: Solve -49*n + 64*n = -50*n + 130 for n.
answer: 2

Write down the solution for this math problem: Solve -89*d + 471 + 482 = 63 for d.
answer: 10

Write down the solution for this math problem: Solve -15*r + 41 = -94 for r.
answer:
9