Question:
Solve -s - 150 = -31*s for s..

Answer:
5

Question:
Solve 54*l - 109*l - 90*l + 26260 = 57*l for l..

Answer:
130

Question:
Solve 0 = -44*p - 230 - 197 - 57 for p..

Answer:
-11

Question:
Solve 55 = 10*p - 30 + 5 for p..

Answer:
8