Question:
Solve 29*w - 63 = 39*w - 3 for w..

Answer:
-6

Question:
Solve -12*g - 105 = 9*g for g..

Answer:
-5

Question:
Solve 4807 - 5192 = 35*d for d..

Answer:
-11

Question:
Solve -374 = -144*k - 2246 for k..

Answer:
-13