3/4 x X + 0,25 = 2/3
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2/3xX-1/4:(11/2-3/4)=1/6
2/3xX:19/4=1/6
2/3xX=1/6x19/4
2/3xX=19/24
X=19/24:2/3
X=19/16
chắc luôn
![](https://rs.olm.vn/images/avt/0.png?1311)
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![](https://rs.olm.vn/images/avt/0.png?1311)
\(\begin{array}{l}a)5{x^3} + {x^3} = (5 + 1){x^3} = 6{x^3}\\b)\dfrac{7}{4}{x^5} - \dfrac{3}{4}{x^5} = \left( {\dfrac{7}{4} - \dfrac{3}{4}} \right){x^5} = \dfrac{4}{4}{x^5} = {x^5}\\c)( - 0,25{x^2}).(8{x^3}) = ( - 0,25.8).({x^2}.{x^3}) = - 2.{x^5}\end{array}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a,=11/12 x 8/15 - 1/6:2
= 22/45-1/2
= 73/180
b, =9/4:0.01
= 225
K nha
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(\frac{3}{4}x-\frac{1}{2}\right).\left(0,25x+\frac{4}{3}\right)=0\)
\(\left(\frac{3}{4}x-\frac{1}{2}\right).\left(\frac{1}{4}x+\frac{4}{3}\right)=0\)
TH1: \(\frac{3}{4}x-\frac{1}{2}=0\)
\(\frac{3}{4}x=\frac{1}{2}\)
\(x=\frac{2}{3}\)
TH2: \(\frac{1}{4}x+\frac{4}{3}=0\)
\(\frac{1}{4}x=-\frac{4}{3}\)
\(x=-\frac{16}{3}\)
Vậy \(x\in\text{{}\frac{2}{3};-\frac{16}{3}\)}
\(\left(\frac{3}{4}x-\frac{1}{2}\right)\left(0,25x+\frac{4}{3}\right)=0\)
\(\Rightarrow\left(\frac{3}{4}x-\frac{1}{2}\right)\left(\frac{1}{4}x+\frac{4}{3}\right)=0\)
\(\Rightarrow\orbr{\begin{cases}\frac{3}{4}x-\frac{1}{2}=0\\\frac{1}{4}x+\frac{4}{3}=0\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}\frac{3}{4}x=\frac{1}{2}\\\frac{1}{4}x=-\frac{4}{3}\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=\frac{2}{3}\\x=-\frac{16}{3}\end{cases}}\)
Vậy...
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x\cdot3:x+2\cdot6:4+x:0,5+0,25+x\cdot1=35\)
=>\(3+3+2x+0,25+x=35\)
=>3x+6,25=35
=>3x=35-6,25=28,75
=>\(x=\dfrac{28.75}{3}=\dfrac{115}{12}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài làm
|x-2/3|+0,25=3/4
|x-2/3|+1/4=3/4
|x-2/3| =3/4-1/4
|x-2/3| =2/4=1/2
|x| =1/2+2/3
|x| =7/6
x =-7/6 hoặc 7/6 !
|x-2/3| + 0,25 = 3/4
|x- 2/3| = 3/4 - 0,25
|x - 2/3| = 1/2
=> \(\orbr{\begin{cases}x-\frac{2}{3}=-\frac{1}{2}\\x-\frac{2}{3}=\frac{1}{2}\end{cases}}\)
=> \(\orbr{\begin{cases}x=-\frac{1}{2}+\frac{2}{3}\\x=\frac{1}{2}+\frac{2}{3}\end{cases}}\)
=> \(\orbr{\begin{cases}x=\frac{1}{6}\\x=\frac{7}{6}\end{cases}}\)
3/4 x X + 1/4=2/3
X+1/4= 2/3 - 3/4= -1/12
X= -1/12-1/4= -1/3
Đúng Cho mình nha
3/4xX+0.25=2/3
3/4xX =2/3-0,25
3/4xX =5/12
X =5/12:3/4
X [=5/9