Q: What is the solution?
Solve -49*r + 50*r - 3 = 0 for r.

A: 3

Q: What is the solution?
Solve 3128 - 2536 = -37*y for y.

A: -16

Q: What is the solution?
Solve 9*f + 19 + 8 = 0 for f.

A:
-3