Question:
Solve 72*k = 322*k - 2500 for k..

Answer:
10

Question:
Solve -472 - 48 = -77*y + 521 + 422 for y..

Answer:
19

Question:
Solve 8*n - 32 = -48 for n..

Answer:
-2

Question:
Solve -15*p + 50 = -40 for p..

Answer:
6