Sagot :
Cevap:
Adım adım açıklama:
25-x=2(15-x)
25-x=30-2x
x=5 çift
Cevap:
Adım adım açıklama: 25 bayan , 15 erkek varmış . Evli çiftlerden x tane olsun . 25-x = 2(15-x)
25-x = 30-2x
x= 5
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