Question:
Solve 31*l - 1194 = -1287 for l..

Answer:
-3

Question:
Solve 10*l + 11*l = 0 for l..

Answer:
0

Question:
Solve 0 = -23*q + 24*q + 3 for q..

Answer:
-3

Question:
Solve 0 = -81*f + 8068 + 7683 - 14536 for f..

Answer:
15