Question:
Solve 0 = c - 5*c + 311 - 287 for c..

Answer:
6

Question:
Solve 0 = 235*s - 206*s + 174 for s..

Answer:
-6

Question:
Solve 38*u = 162*u + 1411 + 2433 for u..

Answer:
-31

Question:
Solve 152*s + 195*s - 286*s = -88*s + 5215 for s..

Answer:
35