Question:
Solve 224 - 156 = 11*y + 178 for y..

Answer:
-10

Question:
Solve 52*r - 28*r - 144 = 8*r for r..

Answer:
9

Question:
Solve -516*l - 1698 = -56*l + 106*l for l..

Answer:
-3

Question:
Solve 43498 + 39558 + 21155 = 1400*q + 24411 for q..

Answer:
57