Q: Solve -50*a = 434 + 915 - 349 for a.

A: -20

Q: Solve 837 = 45*s + 22*s + 26*s for s.

A: 9

Q: Solve 4859 - 9687 = 6*v + 8*v - 4338 for v.

A: -35

Q: Solve -29*u = -52*u + 9*u - 154 for u.

A:
-11