Write down the solution for this math problem: Solve 8*x + 64*x - 504 = 0 for x.
answer: 7

Write down the solution for this math problem: Solve 0 = 10*w - 8*w + 6 for w.
answer: -3

Write down the solution for this math problem: Solve -5*l = 7 + 3 for l.
answer: -2

Write down the solution for this math problem: Solve 4*n - 2*n = -5*n for n.
answer:
0