Write down the solution for this math problem: Solve -123*r + 116*r = 0 for r.
answer: 0

Write down the solution for this math problem: Solve 5*a + 4 = -21 for a.
answer: -5

Write down the solution for this math problem: Solve -4 = 1455*a - 731*a - 726*a for a.
answer: 2

Write down the solution for this math problem: Solve -469*r - 851 = -246*r - 246*r for r.
answer:
37