Q: What is the solution?
Solve -13 = 77*n - 90*n for n.

A: 1

Q: What is the solution?
Solve 140*i - 1013 = 667 for i.

A: 12

Q: What is the solution?
Solve 82*k - 301*k - 74*k - 928 - 3467 = 0 for k.

A:
-15