Question:
Solve -46*f = 22*f - 170*f - 102 for f..

Answer:
-1

Question:
Solve 648688 = -18*t + 649048 for t..

Answer:
20

Question:
Solve 90 = -20*u - 30 - 40 for u..

Answer:
-8

Question:
Solve -166 + 91 = -16*a - 379 for a..

Answer:
-19