Q: Solve:
Solve -6 + 3 = -3*r for r.

A: 1

Q: Solve:
Solve -13 = -14*x + 15 for x.

A: 2

Q: Solve:
Solve 1232*p + 79378 = -540*p + 4422*p + 3456*p for p.

A:
13