Q: What is the solution?
Solve 816*r - 462*r + 1071*r + 22587 = -58638 for r.

A: -57

Q: What is the solution?
Solve -80*r - 746 = -106 for r.

A: -8

Q: What is the solution?
Solve 82*y + 80*y + 36 = 159*y for y.

A:
-12