30/x-5=30/(x+3)等于几要过程
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30/x-5=30/(x+3)等于几要过程30/x-5=30/(x+3)等于几要过程30/x-5=30/(x+3)等于几要过程30/x-5=30/(x+3)30(x+3)-5x(x+3)=30x90-
30/x-5=30/(x+3)等于几要过程
30/x-5=30/(x+3)等于几要过程
30/x-5=30/(x+3)等于几要过程
30/x-5=30/(x+3)
30(x+3)-5x(x+3)=30x
90-5x^2-15x=0
x^2+3x-18=0
(x-3)(x+6)=0
x1=3 x2=-6
30/x-5=30/(x+3)
(30-5x)/x=30/(x+3)
90-5x*5x-15x=30x
5x*5x+15x-90=0
x*x+3x-18=0
(x+6)(x-3)=0
x=3 x=-6
30(x+3)-5x(x+3)=30x
90-5x^2-15x=0
x^2+3x-18=0
(x-3)(x+6)=0
x1=3 x2=-6
2x加3x等于30 x等于几
30/x-5=30/(x+3)等于几要过程
30/x-5=30/(x+3)等于几要过程
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