Write down the solution for this math problem: Solve 0 = -4*n - 1947 + 1991 for n.
answer: 11

Write down the solution for this math problem: Solve 16619*k + 1276 = 16663*k for k.
answer: 29

Write down the solution for this math problem: Solve 651*l - 156 = 642*l + 87 for l.
answer: 27

Write down the solution for this math problem: Solve 0 = 16*i + 15 - 47 for i.
answer:
2