Write down the solution for this math problem: Solve 1504*z - 1507*z = 6 for z.
answer: -2

Write down the solution for this math problem: Solve 9*a + 104 = 5 for a.
answer: -11

Write down the solution for this math problem: Solve -323*i + 58*i - 144*i - 15133 = 0 for i.
answer: -37

Write down the solution for this math problem: Solve 2411 = 65*w - 2965 + 761 for w.
answer:
71