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数学
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方方和圆圆共有书70本,如果方方给圆圆5本,那么圆圆就比方方多4本.问方方和圆圆原来各有多少本书?
人气:288 ℃ 时间:2019-09-02 09:33:50
解答
设方方原来有x本,圆圆原来有y本.
x+y=70
y+5-4=x-5
联立方程组得:x=38
y=32
答:方方原来有38本书,圆圆原来有32本书.
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