Question:
Solve 2*b + 15 = 17 for b..

Answer:
1

Question:
Solve -1698*t + 7089 = -2115*t for t..

Answer:
-17

Question:
Solve 0 = 71*w - 429 + 145 for w..

Answer:
4

Question:
Solve 0 = 57*x + 50*x + 49*x - 159*x - 153 for x..

Answer:
-51