Write down the solution for this math problem: Solve 96*r - 202*r = -97*r + 261 for r.
answer: -29

Write down the solution for this math problem: Solve -3881 = 64*b - 3177 for b.
answer: -11

Write down the solution for this math problem: Solve 5 = 2*b + 3 for b.
answer: 1

Write down the solution for this math problem: Solve -n = -n + 6*n for n.
answer:
0