Q: What is the solution?
Solve 2856 = 1984*d - 2068*d for d.

A: -34

Q: What is the solution?
Solve -8*k - 158 = -198 for k.

A: 5

Q: What is the solution?
Solve -268*r + 261*r + 49 = 0 for r.

A:
7