Write down the solution for this math problem: Solve -2*m + 15 = 5 for m.
answer: 5

Write down the solution for this math problem: Solve 0 = 50661*f - 50597*f + 1152 for f.
answer: -18

Write down the solution for this math problem: Solve 19026 = 1261*r - 165*r - 11662 for r.
answer: 28

Write down the solution for this math problem: Solve 12*x + 1421 = 1361 for x.
answer:
-5