Question:
Solve 21 + 12 = -11*w for w..

Answer:
-3

Question:
Solve -2539 - 2294 = 537*p for p..

Answer:
-9

Question:
Solve 0 = 43*k + 78 - 207 for k..

Answer:
3

Question:
Solve -7278 - 5178 = -5443*x - 25706 - 41180 for x..

Answer:
-10