Write down the solution for this math problem: Solve -3*r = -7*r - 0*r for r.
answer: 0

Write down the solution for this math problem: Solve 457*l - 1101 = 2098 for l.
answer: 7

Write down the solution for this math problem: Solve 124*a + 50432203 = 50442123 for a.
answer: 80

Write down the solution for this math problem: Solve -2428*w + 2564*w - 6256 = 0 for w.
answer:
46