Question: What is the solution?

Solve -35*r - 133 + 28 = 0 for r.

Answer: -3

Question: What is the solution?

Solve 1398*t - 2454 = 764*t + 713*t - 8300 for t.

Answer: 74

Question: What is the solution?

Solve -9*i + 54 = -9 for i.

Answer: 7

Question: What is the solution?

Solve -95*f + 360 = 123*f - 258*f for f.

Answer:
-9