Q: Solve:
Solve -70*k + 2693 - 1643 = 0 for k.

A: 15

Q: Solve:
Solve -58*y + 6 = -127*y + 66*y for y.

A: -2

Q: Solve:
Solve 19*r - 9*r + 50 = 0 for r.

A:
-5