Question:
Solve -21*y - 88*y + 981 = 0 for y..

Answer:
9

Question:
Solve 14 - 206 = 18*f + 6*f for f..

Answer:
-8

Question:
Solve -28254*f = -28263*f - 63 for f..

Answer:
-7

Question:
Solve -4382*j - 32680 = 40542 + 18800 for j..

Answer:
-21