Write down the solution for this math problem: Solve -446 = 45*a + 643 + 666 for a.
answer: -39

Write down the solution for this math problem: Solve 25 = -43*o + 18*o for o.
answer: -1

Write down the solution for this math problem: Solve -9*s + 3 = -10*s for s.
answer: -3

Write down the solution for this math problem: Solve -647*i = -665*i + 180 for i.
answer:
10