QUESTION: Math problem: Solve -22 = -15*f - 16*f + 9 for f.
ANS: 1
QUESTION: Math problem: Solve 0 = -42*v + 16*v + 208 for v.
ANS: 8
QUESTION: Math problem: Solve 33*n + 2 - 687 = 4*n + 620 for n.
ANS: 45
QUESTION: Math problem: Solve 389*l - 2562 = 47*l + 1542 for l.
ANS:
12