Write down the solution for this math problem: Solve 436*a - 14504 - 15144 = 0 for a.
answer: 68

Write down the solution for this math problem: Solve 3*r + 6 - 9 = 0 for r.
answer: 1

Write down the solution for this math problem: Solve -83*u = -4*u - 316 for u.
answer: 4

Write down the solution for this math problem: Solve -240*d - 1416 = -3336 for d.
answer:
8