Cody had the same number of pencils and erasers. After he gave 40 of the
pencils and 16 of the erasers to his best friend, the ratio of the remaining
pencils to that of the erasers became 3 : 5.
(a) How many pencils did Cody have left?
(b) If Cody distrubited the remaining erasers to his brother and sister in the
ratio 1 : 3, how many erasers did Cody's brother receive?
P==Pencils E==Erasers
P/E ==1,
[P - 40] / [E - 16] ==3 / 5, solve for P, E
P==76 pencils
76 - 40 ==26 pencils has left.
76 - 16 ==60 erasers has left.
1 + 3 ==4 - total ratios.
60/4 ==15 share of each ratio.
15 x 1 ==15 erasers given to his brother.
15 x 3 ==45 erasers given to his sister.