Câu hỏi của Trần Anh Tuấn 82

Question

1/2.(x+1) + 1/4.(x+3) = 3.1/3.(x+20note: cái này / là phần nha mấy bạn!Giúp MIk với thanks

Fudo · Accepted Answer

Bài giải$\frac{1}{2}\left(x+1\right)+\frac{1}{4}\left(x+3\right)=3\cdot\frac{1}{3}\cdot\left(x+20\right)$$\frac{1}{2}\left[\left(x+1\right)+\frac{1}{2}\left(x+3\right)\right]=x+20$$\frac{1}{2}\left[x+1+\frac{1}{2}x+\frac{3}{2}\right]=x+20$$\frac{1}{2}\left[x\left(1+\frac{1}{2}\right)+1+\frac{3}{2}\right]=x+20$$\frac{1}{2}\left[\frac{3}{2}x+\frac{5}{2}\right]=x+20$$\frac{3}{4}x+\frac{5}{4}=x+20$$\frac{3}{4}x-x=20-\frac{5}{4}$$\frac{-1}{4}x=\frac{75}{4}$$x=\frac{75}{4}\text{ : }\frac{-1}{4}$$x=-75$Câu trả lời:                                                                Bài giải$\frac{1}{2}\left(x+1\right)+\frac{1}{4}\left(x+3\right)=3\cdot\frac{1}{3}\cdot\left(x+20\right)$$\frac{1}{2}\left[\left(x+1\right)+\frac{1}{2}\left(x+3\right)\right]=x+20$$\frac{1}{2}\left[x+1+\frac{1}{2}x+\frac{3}{2}\right]=x+20$$\frac{1}{2}\left[x\left(1+\frac{1}{2}\right)+1+\frac{3}{2}\right]=x+20$$\frac{1}{2}\left[\frac{3}{2}x+\frac{5}{2}\right]=x+20$$\frac{3}{4}x+\frac{5}{4}=x+20$$\frac{3}{4}x-x=20-\frac{5}{4}$$\frac{-1}{4}x=\frac{75}{4}$$x=\frac{75}{4}\text{ : }\frac{-1}{4}$$x=-75$

Me · Answer

$\frac{1}{2}\left(x+1\right)+\frac{1}{4}\left(x+3\right)=3\cdot\frac{1}{3}\cdot\left(x+20\right)$$\frac{1}{2}\left[\left(x+1\right)+\frac{1}{2}\left(x+3\right)\right]=x+20$$\frac{1}{2}\left[x+1+\frac{1}{2}x+\frac{3}{2}\right]=x+20$$\frac{1}{2}\left[x\left(1+\frac{1}{2}\right)+1+\frac{3}{2}\right]=x+20$$\frac{1}{2}\left[\frac{3}{2}x+\frac{5}{2}\right]=x+20$$\frac{3}{4}x+\frac{5}{4}=x+20$$\frac{3}{4}x-x=20-\frac{5}{4}$$\frac{-1}{4}x=\frac{75}{4}$$x=\frac{75}{4}\text{ : }\frac{-1}{4}$$x=-75$Câu trả lời: $\frac{1}{2}\left(x+1\right)+\frac{1}{4}\left(x+3\right)=3\cdot\frac{1}{3}\cdot\left(x+20\right)$$\frac{1}{2}\left[\left(x+1\right)+\frac{1}{2}\left(x+3\right)\right]=x+20$$\frac{1}{2}\left[x+1+\frac{1}{2}x+\frac{3}{2}\right]=x+20$$\frac{1}{2}\left[x\left(1+\frac{1}{2}\right)+1+\frac{3}{2}\right]=x+20$$\frac{1}{2}\left[\frac{3}{2}x+\frac{5}{2}\right]=x+20$$\frac{3}{4}x+\frac{5}{4}=x+20$$\frac{3}{4}x-x=20-\frac{5}{4}$$\frac{-1}{4}x=\frac{75}{4}$$x=\frac{75}{4}\text{ : }\frac{-1}{4}$$x=-75$

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