There are 85 green and silver coins in Box C. There are 37 green and brown coins in Box D. The number of silver coins in Box C is five times the number of brown coins in Box D. The number of green coins in both boxes is the same.
- How many brown coins are there in Box D?
- Find the total number of green coins in both boxes.
(a)
Number of silver coins = 5 u
Number of brown coins = 1 u
Green coins + 5 u = 85 --- (1)
Green coins + 1 u = 37 --- (2)
(1) - (2)
5 u - 1 u = 85 - 37
4 u = 48
1 u = 48 ÷ 4 = 12
Number of brown coins
= 1 u
= 12
(b)
Number of green coins in Box D
= 37 - 12
= 25
Number of green coins in both boxes
= 2 x 25
= 50
Answer(s): (a) 12; (b) 50