Q: What is the solution?
Solve -2556*k - 180 = -2538*k for k.

A: -10

Q: What is the solution?
Solve 0 = 3*a + 8*a - 2*a for a.

A: 0

Q: What is the solution?
Solve 17*r - 79 = 96*r for r.

A:
-1