Question:
Solve 18*j - 12*j = -18 for j..

Answer:
-3

Question:
Solve d = 6*d - 25 for d..

Answer:
5

Question:
Solve -93*w - 18 = -99*w for w..

Answer:
3

Question:
Solve 5 - 4 = -q for q..

Answer:
-1