Question:
Solve 108*k - 5760 = -132*k - 143*k + 63*k for k..

Answer:
18

Question:
Solve 5493*y - 2450 = 5003*y for y..

Answer:
5

Question:
Solve 13 = 7*r + 41 for r..

Answer:
-4

Question:
Solve 7*d + 1176 = 1169 for d..

Answer:
-1