jumlah kelereng robin,cecep,budi 248 butir ,banyak kelereng robin 4\5 kali banyaknya kelereng cecep, tetapi banyak kelereng budi sama banyak dengan kelereng cecep, berapa banyak kelerang mereka masing-masing?
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Robin = x
cecep = y
Budi = z
jadi, x+y+z=248
x=4/5y
z=y
berarti 4/5y+y+y=248
12/5y=248
y=103
x=4/5.103=82
z=y=103
jadi robin=82
budi=103
cecep=103