Question: What is the solution?

Solve -1 = 3*q - 13 for q.

Answer: 4

Question: What is the solution?

Solve -362*d - 3648 - 2107 = -325 for d.

Answer: -15

Question: What is the solution?

Solve 0 = 8090*f + 1656*f - 1253*f - 625237 - 113654 for f.

Answer: 87

Question: What is the solution?

Solve 0 = 80*s - 82*s - 2 for s.

Answer:
-1