Question:
Solve -1384*z = -1376*z - 32 for z..

Answer:
4

Question:
Solve 222*w - 1570 = -439*w - 1841 - 13610 for w..

Answer:
-21

Question:
Solve 332 - 98 = 39*r for r..

Answer:
6

Question:
Solve -759*r - 225*r + 54*r = 1008*r - 108528 for r..

Answer:
56