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x-[1/4x+(25%x-5)]=65 怎么解
x-[1/4x+(25%x-5)]=65
人气:221 ℃ 时间:2020-03-29 11:49:23
解答
x-[1/4x+(25%x-5)]=65
x-(1/4x+1/4x-5)=65
x-(1/2x-5)=65
1/2x+5=65
1/2x=60
x=120
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