Question: What is the solution?

Solve 97*s - 1509 = 1013 for s.

Answer: 26

Question: What is the solution?

Solve 18*y - 18 = -86 - 40 for y.

Answer: -6

Question: What is the solution?

Solve -180308 = 3609*f - 1236*f - 59285 for f.

Answer: -51

Question: What is the solution?

Solve -40*j + 78*j = 68*j + 540 for j.

Answer:
-18