Question: What is the solution?

Solve 55*x + 38417 = 81199 - 36897 for x.

Answer: 107

Question: What is the solution?

Solve -12*f + 31*f + 53*f = -792 for f.

Answer: -11

Question: What is the solution?

Solve -14*x - 96 = -38*x for x.

Answer: 4

Question: What is the solution?

Solve 475 = 3*r + 490 for r.

Answer:
-5