Question:
Solve 112840 = -435*q - 600*q + 167*q for q..

Answer:
-130

Question:
Solve -13112 = 6636*r - 6785*r for r..

Answer:
88

Question:
Solve 135 = 642*l - 627*l for l..

Answer:
9

Question:
Solve -3174*n = -3109*n - 1625 for n..

Answer:
25