Question: What is the solution?

Solve -1306*s + 28 = -1299*s for s.

Answer: 4

Question: What is the solution?

Solve 319*j - 333*j = -140 for j.

Answer: 10

Question: What is the solution?

Solve -46*n - 56 = -18*n for n.

Answer: -2

Question: What is the solution?

Solve 50 + 30 = -15*f - 100 for f.

Answer:
-12