QUESTION: Math problem: Solve 0 = -6*a + 4*a - 2 for a.
ANS: -1
QUESTION: Math problem: Solve 30*n - 14*n - 1716 = -18*n + n for n.
ANS: 52
QUESTION: Math problem: Solve 105*o - 106*o = -4 for o.
ANS: 4
QUESTION: Math problem: Solve -4 = -4*a + 5*a for a.
ANS:
-4