Question:
Solve -37 = 42*q - 247 for q..

Answer:
5

Question:
Solve -23416 - 13 = 167*v - 10570 for v..

Answer:
-77

Question:
Solve 335*z + 33047 = 576*z + 389*z - 24283 for z..

Answer:
91

Question:
Solve -149943*r + 149923*r - 120 = 0 for r..

Answer:
-6