QUESTION: Math problem: Solve 6*a + 20 = 50 for a.
ANS: 5
QUESTION: Math problem: Solve 0 = 263*f - 476*f - 4686 for f.
ANS: -22
QUESTION: Math problem: Solve -90*x = -24*x + 71*x + 1781 for x.
ANS: -13
QUESTION: Math problem: Solve 6*a - 4 = 8 for a.
ANS:
2