Question:
Solve 252 = 19*r + 23*r for r..

Answer:
6

Question:
Solve -396*z - 97 = -192*z + 6023 for z..

Answer:
-30

Question:
Solve 0 = 48*m - 108*m + 45*m - 195 for m..

Answer:
-13

Question:
Solve 88 = 62*p - 51*p for p..

Answer:
8