Write down the solution for this math problem: Solve -36 = -9*d - 9*d for d.
answer: 2

Write down the solution for this math problem: Solve -9*x - 16 = -13*x for x.
answer: 4

Write down the solution for this math problem: Solve 99*z - 866 = -262 + 584 for z.
answer: 12

Write down the solution for this math problem: Solve 0*w + 2*w - 2 = 0 for w.
answer:
1