Write down the solution for this math problem: Solve -7*z = -14*z + 21 for z.
answer: 3

Write down the solution for this math problem: Solve -2 = 12*d + 10 for d.
answer: -1

Write down the solution for this math problem: Solve -3216*o = -299*o + 52506 for o.
answer: -18

Write down the solution for this math problem: Solve 36 = -11*y + 14 for y.
answer:
-2