Question:
Solve 18 - 16 = -2*d for d..

Answer:
-1

Question:
Solve 6*m + 168569 - 168443 = 0 for m..

Answer:
-21

Question:
Solve 0 = 19*j - 2 - 93 for j..

Answer:
5

Question:
Solve 847*d + 880*d + 708*d - 379*d = -117192 for d..

Answer:
-57