Question:
Solve -39919 = 3635*z - 10839 for z..

Answer:
-8

Question:
Solve 39*m + 50*m - 65*m + 1680 = 0 for m..

Answer:
-70

Question:
Solve -7*t - 17 - 18 = 0 for t..

Answer:
-5

Question:
Solve 41*m - 18 = 38*m for m..

Answer:
6