Question:
Solve 795*r = 821*r - 364 for r..

Answer:
14

Question:
Solve -5*q = -371 + 366 for q..

Answer:
1

Question:
Solve -871*s - 7914 = -20979 for s..

Answer:
15

Question:
Solve 0 = 5*z - 13*z + 8 for z..

Answer:
1