Question:
Solve 83*d + 153*d = -95*d + 110*d + 5525 for d..

Answer:
25

Question:
Solve 0 = -237*s - 8371 + 3142 - 4725 for s..

Answer:
-42

Question:
Solve 0 = 175*d + 8442 - 4939 - 28178 for d..

Answer:
141

Question:
Solve -14*r = -13*r - 2 for r..

Answer:
2