QUESTION: Math problem: Solve 80 = -50*i + 280 for i.
ANS: 4
QUESTION: Math problem: Solve 3*i + 133*i = -216*i + 2464 for i.
ANS: 7
QUESTION: Math problem: Solve 9*j + 81*j - 45*j - 3420 = 0 for j.
ANS: 76
QUESTION: Math problem: Solve -3*o - 371 + 389 = 0 for o.
ANS:
6