Write down the solution for this math problem: Solve -87*w = -109*w + 286 for w.
answer: 13

Write down the solution for this math problem: Solve 150 = -76*g - 78 for g.
answer: -3

Write down the solution for this math problem: Solve 0 = -39*g + 427 - 76 for g.
answer: 9

Write down the solution for this math problem: Solve 0 = 18*k - 19*k + 3 for k.
answer:
3