QUESTION: Math problem: Solve -31*o + 13*o + 72 = 0 for o.
ANS: 4
QUESTION: Math problem: Solve -5*d - 33 = -13 for d.
ANS: -4
QUESTION: Math problem: Solve -89 = -48*g + 30*g + 73 for g.
ANS: 9
QUESTION: Math problem: Solve 252*n - 210*n = -378 for n.
ANS:
-9