Question:
Solve 0 = 15*k + 7931 - 7751 for k..

Answer:
-12

Question:
Solve 28498 - 12727 = -2411*o - 39682 for o..

Answer:
-23

Question:
Solve -89*z - 51*z - 1833 = z for z..

Answer:
-13

Question:
Solve -177*n + 169*n + 56 = 0 for n..

Answer:
7