x(x-3)=3x-9
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x(x-3)=3x-9
x(x-3)=3x-9
x(x-3)=3x-9
x-3x=3x-9
x-6x+9=0
(x-3)=0
x=3
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小朋友,这道题很简单的答案为:x=3
x(x-3)=3x-9
x(x-3)=3(x-3)
(x-3)(x-3)=0
x=3
x(x-3)=3x-9
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