1800/x=1.2×1560/﹙x+2﹚怎么解

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1800/x=1.2×1560/﹙x+2﹚怎么解
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1800/x=1.2×1560/﹙x+2﹚怎么解
1800/x=1.2×1560/﹙x+2﹚怎么解

1800/x=1.2×1560/﹙x+2﹚怎么解

两边同乘x(x+2)得:

1800(x+2)=1.2×1560x

1800x+3600=1872x

72x=3600

x=50


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解 1800/x=1872/(x+2),x≠0且x≠-2
1800(x+2)=1872x
3600=72x
x=50
经检验x=50

1800/x=1.2×1560/﹙x+2﹚
1800×(x+2)=1.2×1560×x
1800X+3600=1872X
72X=3600
X=50

1800/x=1872/(x+2)
1800(x+2)=1872x
100(x+2)=104x
100x+200=104x
x=50