60(8-x)+40x=420 求详解

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60(8-x)+40x=420求详解60(8-x)+40x=420求详解60(8-x)+40x=420求详解60(8-x)+40x=420480-60x+40x=42060x-40x=480-4202

60(8-x)+40x=420 求详解
60(8-x)+40x=420 求详解

60(8-x)+40x=420 求详解
60(8-x)+40x=420
480-60x+40x=420
60x-40x=480-420
20x=60
x=60/20
x=3

60(8-x)+40x=420
480-60x+40x=420
-20x=-60
x=3

你好,很高兴为你解答
首先展开为480-60x+40x=420
合并同类项480-420=60x-40x
得出 60=20X
系数化为一 X=3
希望能够帮助到你,如有疑问请再追问中提出,谢谢!

480-60x+40x=420
-20x=420-480=-60
x=(-60)/(-20)=3