Question:
Solve 0 = -87*s - 47*s + 283 + 387 for s..

Answer:
5

Question:
Solve 23*w - 19*w + 8 = 0 for w..

Answer:
-2

Question:
Solve -551*t - 70 = -561*t for t..

Answer:
7

Question:
Solve -416*s = -431*s - 105 for s..

Answer:
-7