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3.x-1452+156=879
3.x-1452=879-156
3.x-1452=723
3.x=723+1452
3.x=2175
x=2175:3
x=725
![](https://rs.olm.vn/images/avt/0.png?1311)
x:125=\(\frac{69}{115}\)
x=\(\frac{69}{115}\times125\)
x=75
![](https://rs.olm.vn/images/avt/0.png?1311)
`x xx 95 + x + x : 0,25 = 7963`
`x xx (95 + 1 + 4) = 7963`
`x xx 100 = 7963`
`=> x = 79,63`.
![](https://rs.olm.vn/images/avt/0.png?1311)
`x xx95+x+x:0,25=102,34`
`x xx95+x+x xx4=102,34`
`x xx(95+1+4)=102,34`
`x xx100=102,34`
`x=102,34:100=1,0234`
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x\left(45+1+54\right)=9872\)
\(x\times100=9872\)
\(x=9872:100\)
\(x=98.72\)
X x45 + X +X x 54 =9872
X x45 + Xx1 +Xx54=9872
X x ( 45 + 1 + 54) = 9872
X x 100 = 9872
X = 9872 : 100
X = 98,72
![](https://rs.olm.vn/images/avt/0.png?1311)
`x-(5/6 -x) =x-2/3`
`x-5/6 +x -x+2/3 =0`
`x = 5/6-2/3 = 5/6 -4/6 = 1/6`
![](https://rs.olm.vn/images/avt/0.png?1311)
\(x\times103-x\times1-x:0,01=44,8\)
\(x\times103-x\times1-x:\dfrac{1}{100}=44,8\)
\(x\times103-x\times1-x\times100=44,8\)
\(x\times\left(103-1-100\right)=44,8\)
\(x\times2=44,8\)
\(x=44,8:2\)
\(x=22,4\)
= x x 103 - x x 1 - x x 100 = 44,8
\(x\left(103-1-100\right)=44,8\)
\(x\times2=44,8\)
\(x=22,4\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có :
\(x-\dfrac{8}{5}< -6\\ \Rightarrow x< -6+\dfrac{8}{5}\\ \Rightarrow x< -\dfrac{22}{5}=-4\dfrac{2}{5}\\ \Rightarrow-6< x< -1\dfrac{2}{5}\\ \Rightarrow x=-5\)
Vậy...
ở dòng -6<x<-1\(\dfrac{2}{5}\) thì số -1\(\dfrac{2}{5}\) lấy đâu ra thế bạn
x + 557 = 580
x = 580 - 557
x = 23
x + 557 = 580
x= 580 - 557
x= 23