Write down the solution for this math problem: Solve 2351*r + 318 = 1146*r + 1046*r for r.
answer: -2

Write down the solution for this math problem: Solve -87 = 4*n - 67 for n.
answer: -5

Write down the solution for this math problem: Solve -29*r = 33 + 54 for r.
answer: -3

Write down the solution for this math problem: Solve 12*u = 14206 - 13822 for u.
answer:
32