Question: What is the solution?

Solve 0 = -92*f + 512 + 500 for f.

Answer: 11

Question: What is the solution?

Solve 57*k - 58*k = 78*k + 114*k + 2895 for k.

Answer: -15

Question: What is the solution?

Solve 0 = -20*z - 40*z + 300 for z.

Answer: 5

Question: What is the solution?

Solve 0 = -s - 3*s + 110*s + 636 for s.

Answer:
-6