Write down the solution for this math problem: Solve 32666*b - 352 = 32634*b for b.
answer: 11

Write down the solution for this math problem: Solve -103*a - 1035 = 668 - 261 for a.
answer: -14

Write down the solution for this math problem: Solve -9*d = 3*d - 72 + 84 for d.
answer: -1

Write down the solution for this math problem: Solve 0*r - r = 2*r for r.
answer:
0