Q: What is the solution?
Solve 15*p + 812 = 977 for p.

A: 11

Q: What is the solution?
Solve 111*k + 906 = -65*k + 25*k for k.

A: -6

Q: What is the solution?
Solve 2 = -67*c + 68*c - 11 for c.

A:
13