Perbandingan jumlah buah kelengkeng Coki dan Diki adalah 7: 2. Jika kelengkeng coki lebih banyak 25 buah. Berapa jumlah kelengkeng
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Jawab:
Coki : Diki
7 : 2
25+d : d
7d = 50 + 2d
7d - 2d = 50
5d = 50
d = 10
Jadi kelengkeng diki = 10
kelengkeng coki = 25+10
= 35