Question:
Solve 163 = -6*u + 65*u - 14 for u..

Answer:
3

Question:
Solve -899*d = 22*d + 7368 for d..

Answer:
-8

Question:
Solve -28051 = -14*z - 29255 for z..

Answer:
-86

Question:
Solve -27 + 1 = 13*o for o..

Answer:
-2