Write down the solution for this math problem: Solve 18*c - 19*c = 4 for c.
answer: -4

Write down the solution for this math problem: Solve 1237*i = -33357 - 1279 for i.
answer: -28

Write down the solution for this math problem: Solve 34*u - 3001 = -2695 for u.
answer: 9

Write down the solution for this math problem: Solve 38*u - 37*u = 1 for u.
answer:
1