Question: What is the solution?

Solve -67*c = -47*c + 160 for c.

Answer: -8

Question: What is the solution?

Solve 10*w - 639 = -729 for w.

Answer: -9

Question: What is the solution?

Solve -92*q - 122*q = -9*q - 820 for q.

Answer: 4

Question: What is the solution?

Solve -8161*f + 100851 - 362003 = 0 for f.

Answer:
-32