Q: Solve -73*f - 25*f = -686 for f.

A: 7

Q: Solve 847 - 784 = 7*z for z.

A: 9

Q: Solve 45 = 26*j + 155 + 306 for j.

A: -16

Q: Solve -90*v = 1158 + 1889 + 1183 for v.

A:
-47