Question: What is the solution?

Solve -6168*f + 6163*f = -30 for f.

Answer: 6

Question: What is the solution?

Solve -214*t + 2180 + 174 = 0 for t.

Answer: 11

Question: What is the solution?

Solve 18*s + 30 = 12 for s.

Answer: -1

Question: What is the solution?

Solve 64*p - 71*p = -49 for p.

Answer:
7