Write down the solution for this math problem: Solve -3*r = 20 - 14 for r.
answer: -2

Write down the solution for this math problem: Solve -4*m + 11*m - 14 = 0 for m.
answer: 2

Write down the solution for this math problem: Solve 0 = 121*l - 120*l - 3 for l.
answer: 3

Write down the solution for this math problem: Solve 13*o = 5657 - 5410 for o.
answer:
19