Q: What is the solution?
Solve 76*r + 155 = -112 - 569 for r.

A: -11

Q: What is the solution?
Solve 0 = -271*k - 550357 + 527051 for k.

A: -86

Q: What is the solution?
Solve -2800 = -1899*u - 8416 - 17172 for u.

A:
-12