Write down the solution for this math problem: Solve 33*c + 280*c + 2191 = 0 for c.
answer: -7

Write down the solution for this math problem: Solve 52*d + 230011 = 229959 for d.
answer: -1

Write down the solution for this math problem: Solve -14*k - 5*k + 1023 - 3 = 49*k for k.
answer: 15

Write down the solution for this math problem: Solve -280*y - 2744 = 138*y - 40*y - 98 for y.
answer:
-7