Question:
Solve 541 = 30*z + 601 for z..

Answer:
-2

Question:
Solve 80 = -3*c + 10*c + 9*c for c..

Answer:
5

Question:
Solve 0 = 4*m - 54 + 42 for m..

Answer:
3

Question:
Solve 0 = -287*s + 11659 - 21991 for s..

Answer:
-36