Question: What is the solution?

Solve -81 + 9 = -72*d for d.

Answer: 1

Question: What is the solution?

Solve 0 = -3457*d + 7044*d - 3488*d + 3663 for d.

Answer: -37

Question: What is the solution?

Solve 754*x + 165*x = 32165 for x.

Answer: 35

Question: What is the solution?

Solve 5*b - 35 = 16*b - 134 for b.

Answer:
9