Question:
Solve -283 - 302 = 15*d - 321 + 366 for d..

Answer:
-42

Question:
Solve -499*k + 451*k - 142 = -430 for k..

Answer:
6

Question:
Solve 0 = 665*t + 383*t + 17816 for t..

Answer:
-17

Question:
Solve -6*d - 1 = -19 for d..

Answer:
3