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8x减5x等于27解方程

解 :8x-5x=27 3x=27 x=27/3 x=9

8x5x=27 3x=27 x=27除以3 x=9望采纳

8-5x=275x=8-27=-19 x=19/5 检验你就把x=19/5代入等式就行了

8x-5x=273x=27x=27÷3x=9验算x=9左边=8*9-5*9=72-45=27=右边所以x=9是方程的解

(8-5)X=27,3X=27,X=9,检验:把X=9代入方程:左边=8*9-5*9=27=右边.

3X

8(x-3)-5x=278x-24-5x=273x=51x=17

8x-5x=27,3x=27,x=27÷3,x=9,检验,将x=9代入原方程,左边=8*9-5*9=72-45=27=右边,x=9是原方程的解.

加减法一样子.-3x=27x=-9

解:8x-5x=27 3x=27 x=9

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