Write down the solution for this math problem: Solve 28*u + 102 = -6*u for u.
answer: -3

Write down the solution for this math problem: Solve 1325*r + 1492*r + 1308 = -705*r + 131622 for r.
answer: 37

Write down the solution for this math problem: Solve 9*y - 3 = 49*y - 3 for y.
answer: 0

Write down the solution for this math problem: Solve 105*r + 1189 + 5451 = -1970 for r.
answer:
-82