Q: Solve 3131*w - 23385 = -4079*w - 1755 for w.

A: 3

Q: Solve -v + 76 = 80 for v.

A: -4

Q: Solve 0 = 117*v - 113*v - 16 for v.

A: 4

Q: Solve -r - 57 = -59 for r.

A:
2