Question:
Solve 852*m - 5123 - 1737 = -128*m for m..

Answer:
7

Question:
Solve 92*r - 46*r - 39*r = 21 for r..

Answer:
3

Question:
Solve -308 = 27*x - 524 for x..

Answer:
8

Question:
Solve 0 = -212*o - 12167 - 5330 + 537 for o..

Answer:
-80