Write down the solution for this math problem: Solve 71*d - 147 = 251 + 241 for d.
answer: 9

Write down the solution for this math problem: Solve 0 = -10*b - 115 + 165 for b.
answer: 5

Write down the solution for this math problem: Solve -66*d + 880 = 8 - 382 for d.
answer: 19

Write down the solution for this math problem: Solve 3*w + 4*w = 28 for w.
answer:
4