Question: What is the solution?

Solve -38*r + 776 = 244 for r.

Answer: 14

Question: What is the solution?

Solve 20 = 6*v - v for v.

Answer: 4

Question: What is the solution?

Solve 647*k + 1564 = 693*k for k.

Answer: 34

Question: What is the solution?

Solve 0 = 248*s - 260*s - 120 for s.

Answer:
-10