Question:
Solve 5947 = -195*a - 118*a for a..

Answer:
-19

Question:
Solve -7 + 32 = 5*f for f..

Answer:
5

Question:
Solve -596 + 572 = -6*d for d..

Answer:
4

Question:
Solve -28*d + 21 - 77 = 0 for d..

Answer:
-2