Write down the solution for this math problem: Solve -50*r + 7030 + 2208 = 33*r + 2432 for r.
answer: 82

Write down the solution for this math problem: Solve -73*y - 993 + 372 = 1715 for y.
answer: -32

Write down the solution for this math problem: Solve -543*y + 10 = -538*y for y.
answer: 2

Write down the solution for this math problem: Solve -306 = 21614*r - 21631*r for r.
answer:
18