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a) 4(x+41)=7
x+41=7/4
x=7/4-41
x=157/4
b) có gì đó sai sai-.-
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2\left(x-51\right)-22=20.\)
\(2\left(x-51\right)=20+22.\)
\(2\left(x-51\right)=42.\)
\(x-51=42:2.\)
\(x-51=21.\)
\(x=21+51.\)
\(x=72.\)
Vậy.....
~ Học tốt!!! ~
\(2(x-51)-22=20\)
\(2x-102=20+22\)
\(2x-102=42\)
\(2x=144\)
\(x=72\)
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\(2\left(x-51\right)=2.2^3+20\)
\(\Leftrightarrow2\left(x-51\right)=16+20\)
\(\Leftrightarrow2\left(x-51\right)=36\)
\(\Leftrightarrow x-51=13\)
\(\Leftrightarrow x=64\)
Vậy ..
cho mk hỏi xíu 2,2\(^3\) + 20 hay là 2\(\times\)2\(^3\)+20 vậy
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a) \(|2x|.|3.5|=|-2.8|\)
\(\Rightarrow|2x|.|15|=|-16|\)
\(\Rightarrow|2x|.15=16\)
\(\Rightarrow|2x|=\dfrac{16}{15}\)
Ta có hai trường hợp:
1) \(2x\ge0\)
\(\Rightarrow|2x|=2x=\dfrac{16}{15}\Rightarrow x=\dfrac{8}{15}\)
2) \(2x< 0\)
\(\Rightarrow|2x|=-2x=\dfrac{16}{15}\Rightarrow-x=\dfrac{8}{15}\Rightarrow x=-\dfrac{8}{15}\)
Vậy \(x=\dfrac{8}{15}\) hoặc \(x=-\dfrac{8}{15}\).
b) \(|x-\dfrac{1}{2}|+|x+y|=0\)
\(\Rightarrow\left\{{}\begin{matrix}x-\dfrac{1}{2}=0\\x+y=0\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}x=\dfrac{1}{2}\\y=-\dfrac{1}{2}\end{matrix}\right.\)
Vậy \(\left\{{}\begin{matrix}x=\dfrac{1}{2}\\y=-\dfrac{1}{2}\end{matrix}\right.\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2(x-51)=2\cdot2^3+20\)
\(2(x-51)=2\cdot8+20\)
\(2(x-51)=16+20\)
\(2(x-51)=36\)
\(x-51=36:2\)
\(x-51=18\)
\(x=18+51\)
\(x=69\)
2 ( x - 51 ) = 2 . 23 + 20
2 ( x - 51 ) = 24 + 20
2 ( x - 51 ) = 16 + 20
2 ( x - 51 ) = 36
( x - 51 ) = 36 : 2
( x - 51 ) = 18
x = 18 + 51
x = 69
Vậy x = 69
Tk nhé!!!
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a) 2(x-51)=2.23+20 b)32(x+4)-52=5.52
2(x-51)=2.8+20 9(x+4)-25=125
2(x-51)=36 9(x+4)=125+25
x-51=36:2 9(x+4)=150
x-51=18 x+4= 150:9
x=18+51 x+4=50/9
x=69 x=14/9
Vậy:x=69 Vậy:x=14/9
Mik sai thì thôi nha!!!!
a) 2(x-51)=2.23+20 b)32(x+4)-52=5.52
2(x-51)=2.8+20 9(x+4)-25=125
2(x-51)=36 9(x+4)=125+25
x-51=36:2 9(x+4)=150
x-51=18 x+4= 150:9
x=18+51 x+4=50/9
x=69 x=4/9
Vậy:x=69 Vậy:x=4/9
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2[x-51]=30,648
x-51=30,648/2
x-51=15,324
x=15,324+51
x=66,324
vậy x=66,324
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`2(x-51) = 2*2^3+20`
`=>2(x-51) = 2*8+20`
`=>2(x-51) =16+20`
`=>2(x-51) =36`
`=> x-51=36:2`
`=>x-51= 18`
`=>x=18+51`
`=> x= 69`
\(2\left(x-51\right)=2\cdot2^3+20\)
\(x-51=2^3+10\)
\(x-51=18\)
\(x=18+51\)
\(x=69\)
2 . ( x - 51 ) = 2 . 8 + 20
2 . ( x - 51 ) = 16 + 20
2 . ( x - 51 ) = 36
x - 51 = 36 : 2
x - 51 = 18
x = 18 + 51
x = 69
x=33 nha ban