Write down the solution for this math problem: Solve 0 = 821*d + 4196*d + 246945 + 28990 for d.
answer: -55

Write down the solution for this math problem: Solve 17*u - 20*u - 12 = 0 for u.
answer: -4

Write down the solution for this math problem: Solve 2133 = 47*u + 656*u + 26738 for u.
answer: -35

Write down the solution for this math problem: Solve 0 = 11*c - 301 + 389 for c.
answer:
-8