Question:
Solve -537*d - 24778 + 8131 = 0 for d..

Answer:
-31

Question:
Solve 12*r - 195 = -279 for r..

Answer:
-7

Question:
Solve -28*z + 33*z = -5 for z..

Answer:
-1

Question:
Solve -20*q - 29*q - 119 = -66*q + 24*q for q..

Answer:
-17