Question:
Solve -13293*a - 44896 = -11890*a for a..

Answer:
-32

Question:
Solve -1003*f - 1274 = -263*f - 351*f - 291*f for f..

Answer:
-13

Question:
Solve 664 + 194 = 219*f - 252*f for f..

Answer:
-26

Question:
Solve -2*w + 30 = 26 for w..

Answer:
2