x-(4-3x)=9-学生作业帮-兵器谱
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x-(4-3x)=9

来源:学生作业帮 编辑:作业帮 时间:2019/05/25 01:20:22

x-(4-3x)=9

x=13/4

x-(4-3x)=9
解:x-4+3x=9
4x-4=9
4x=9+4
4x=13
x=13/4

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