Q: Solve -21*w + 7 = -14 for w.

A: 1

Q: Solve -8265*o = -8267*o for o.

A: 0

Q: Solve -9*z + 0*z = -2*z for z.

A: 0

Q: Solve -1853430*j + 2664 = -1853502*j for j.

A:
-37