Question:
Solve 2*u = -2*u - 4 for u..

Answer:
-1

Question:
Solve 5*p + 310 = 330 for p..

Answer:
4

Question:
Solve -6081*s - 325 = -6106*s for s..

Answer:
13

Question:
Solve -29*z + 36*z + 14 = 0 for z..

Answer:
-2