There are 89 green and pink coins in Box R. There are 53 green and white coins in Box S. The number of pink coins in Box R is four times the number of white coins in Box S. The number of green coins in both boxes is the same.
- How many white coins are there in Box S?
- Find the total number of green coins in both boxes.
(a)
Number of pink coins = 4 u
Number of white coins = 1 u
Green coins + 4 u = 89 --- (1)
Green coins + 1 u = 53 --- (2)
(1) - (2)
4 u - 1 u = 89 - 53
3 u = 36
1 u = 36 ÷ 3 = 12
Number of white coins
= 1 u
= 12
(b)
Number of green coins in Box S
= 53 - 12
= 41
Number of green coins in both boxes
= 2 x 41
= 82
Answer(s): (a) 12; (b) 82