(1-x)比4=3\20 10比2=(x-1\3)比1\10 4\5比(x+2)=1\10

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(1-x)比4=3\20 10比2=(x-1\3)比1\10 4\5比(x+2)=1\10

(1-x)比4=3\20 10比2=(x-1\3)比1\10 4\5比(x+2)=1\10
(1-x)比4=3\20 10比2=(x-1\3)比1\10 4\5比(x+2)=1\10

(1-x)比4=3\20 10比2=(x-1\3)比1\10 4\5比(x+2)=1\10
(1-x)比4=3\20
1-x=20/12=5/3
x=-2/3
10比2=(x-1\3)比1\10
x-1\3=1
x=4/3
4\5比(x+2)=1\10
x+2=4/5*10=8
x=6