Q: What is the solution?
Solve 395*r + 18292 = -740*r - 16893 for r.

A: -31

Q: What is the solution?
Solve 231886 = -12146*y + 608412 for y.

A: 31

Q: What is the solution?
Solve 23*k + 18 = 20*k for k.

A:
-6