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　　Agirlhasbrotherandsister.shehasasmanybrothersasshehassisters.herbrotherstwiceasmanysistersashehasbrothers.Howmanychildren?请看补充！Agirlhasbrothersandsisters.shehasasmanybrothersasshehassisters.herbrothers

　　Agirlhasbrotherandsister.

　　shehasasmanybrothersasshehassisters.

　　herbrotherstwiceasmanysistersashehasbrothers.

　　Howmanychildren?

　　请看补充！Agirlhasbrothersandsisters.

　　shehasasmanybrothersasshehassisters.

　　herbrotherstwiceasmanysistersashehasbrothers.

　　Howmanychildren?

1回答

2020-03-1401:39

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林晓志

　　supposexgirlsandyboys

　　x-1=y

　　x=2*(y-1)

　　x=4

　　y=3

　　x+y=7

　　Thereare7children

2020-03-14 01:41:14

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