Q: Solve:
Solve 42*k = 33*k - 18 for k.

A: -2

Q: Solve:
Solve 656*y - 687*y = -154 + 681 for y.

A: -17

Q: Solve:
Solve 207*q + 7919 + 894 = -2329 + 585 for q.

A:
-51