Write down the solution for this math problem: Solve 1643 = -48*i + 1115 for i.
answer: -11

Write down the solution for this math problem: Solve 15*c + 97 = 97 for c.
answer: 0

Write down the solution for this math problem: Solve 234*z = 42*z - 768 for z.
answer: -4

Write down the solution for this math problem: Solve 50*d = 272*d + 239*d + 11064 for d.
answer:
-24