问题标题:
谁帮我解英文数学题ThenumberofbeadsinBoxGwas6/17timesasmanyasthenumberofbeadsinBoxC.SallylatertooksomebeadsfrombothboxesandgavethemtoKelvin.ThenumberofbeadsshetookfromBoxGwas7/18timesthenumberofb
问题描述:
谁帮我解英文数学题
ThenumberofbeadsinBoxGwas6/17timesasmanyasthenumberofbeadsinBoxC.SallylatertooksomebeadsfrombothboxesandgavethemtoKelvin.ThenumberofbeadsshetookfromBoxGwas7/18timesthenumberofbeadsshetookfromBoxC.asaresult,shehad49beadsleftinboxCand16beadsleftinBoxG.howmanybeadsdidSallygivetoKelvin?
何世全回答:
G盒子里的珠子是C盒子里的6/17,sally从两个盒子里拿出珠子给了kelvin,她从G里面拿出的珠子是C里面的7/18,结果,C里面还剩49个珠子,G里剩16个,问sally拿了多少珠子给kelvin.
设
G里有g个珠子,C里有c个珠子
sally从G里拿出x个珠子,从C里拿出y个珠子
则,
c*6/17=g
y*7/18=x
x+16=g
y+49=c
解这个方程组便可得出
g=30
c=85
x=14
y=36
所以x+y=14+36=50
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