Question:
Solve -200*u = -2068573 + 2068373 for u..

Answer:
1

Question:
Solve 58*w + 2678 + 2790 = 1640 for w..

Answer:
-66

Question:
Solve -16*o + 11*o + 15 = 0 for o..

Answer:
3

Question:
Solve -13*f + 15 = -16*f for f..

Answer:
-5