Question:
Solve 3*c + 3*c = -12 for c..

Answer:
-2

Question:
Solve 28*s - 6 = 26*s for s..

Answer:
3

Question:
Solve 0 = -11*t - 83 + 94 for t..

Answer:
1

Question:
Solve -245*s + 35 = -250*s for s..

Answer:
-7