QUESTION: Math problem: Solve 1821*o + 206*o + 2547*o - 79920 = 578*o for o.
ANS: 20
QUESTION: Math problem: Solve 10*v + 160 = 42*v for v.
ANS: 5
QUESTION: Math problem: Solve 455 = -333*i - 202*i + 373 + 1152 for i.
ANS: 2
QUESTION: Math problem: Solve 0 = 12*r - 10 - 26 for r.
ANS:
3