Question:
Solve 0*x = -3*x + 12 for x..

Answer:
4

Question:
Solve 69 = 35*y - 36 for y..

Answer:
3

Question:
Solve -12417*d + 9408*d = -55115 + 211583 for d..

Answer:
-52

Question:
Solve -190*c - 107*c - 6132 + 1681 = 4459 for c..

Answer:
-30