Write down the solution for this math problem: Solve 902999*k - 2380 = 903084*k for k.
answer: -28

Write down the solution for this math problem: Solve -4086 = 668940*r - 668852*r - 214 for r.
answer: -44

Write down the solution for this math problem: Solve 1363*l + 28440 = 1600*l for l.
answer: 120

Write down the solution for this math problem: Solve -179*r + 187*r = 0 for r.
answer:
0