At a snack bar, hot dogs cost $3.50 and hamburgers cost $5.00. If the snack bar sold 27 snacks and made $118.50 in revenue, how many hot dogs were sold? How many hamburgers?

Answer is 16

d = hot dogs sold b = hamburgers sold

hot dogs cost $3.50 → 3.5d

hamburgers cost $5 → 5b

snack stand sold 27 snacks → d + b = 27

made $118.50 in revenue → Total $ = 118.5 d + b = 27 3.5d + 5b = 118.5 - 5d - 5b = - 135 + 3.5d + 5b = 118.5 - 1.5d + 0b = - 16.5

d = 11

d + b = 27

11 + b = 27

b = 16