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Jasmine2008
7 tháng trước

giải phương trình 3x−812 = 5−x8

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Jun Hun Kim
7 tháng trước

3x-812=5-x8

⇔(3x-8).8=(5-x).12

⇔24x-64=60-12x

⇔36x=124

⇔x=12436

⇔x=319

leduyhien7020
7 tháng trước

Đáp án + Giải thích các bước giải

3x-812=5-x8

⇒8(3x-8)=12(5-x)

⇒24x-64=60-12x

⇒24x+12x=60+64

⇒36x=124

⇒x=124:36=12436=319

 

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