Question:
Solve -3721 + 3191 = -530*t for t..

Answer:
1

Question:
Solve 733*d = 439*d + 294 for d..

Answer:
1

Question:
Solve -33*h + 29*h = 20 for h..

Answer:
-5

Question:
Solve 427*d - 307*d = -2256 - 864 for d..

Answer:
-26