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17x + 3. ( -16x – 37) = 2x + 43 - 4x
<=>17x-48x-111=-2x+43
<=>-29x=154
<=> \(x=-\frac{154}{29}\)
-3. (2x + 5) -16 < -4. (3 – 2x)
\(\Leftrightarrow-6x-31< -12+8x.\)
\(\Leftrightarrow-14x< 19\Rightarrow x< -\frac{19}{14}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
`17/2 \div x=5`
`x=17/2 \div 5`
`x=17/10 = 1,7`
`----`
`x-3/8=2+1/4`
`x-3/8=9/4`
`x=9/4+3/8`
`x=21/8`
`\color{blue}\text {#DuyNam}`
\(\dfrac{17}{2}:x=5\)
\(x=\dfrac{17}{2}:5=\dfrac{17}{2}\times\dfrac{1}{5}\)
\(x=\dfrac{17}{10}\)
_____________________________
\(x-\dfrac{3}{8}=2+\dfrac{1}{4}\) \(=\dfrac{8}{4}+\dfrac{1}{4}\)
\(x-\dfrac{3}{8}=\dfrac{9}{4}\)
\(x=\dfrac{9}{4}+\dfrac{3}{8}=\dfrac{18}{8}+\dfrac{3}{8}\)
\(x=\dfrac{21}{8}\)
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tìm số ngyên x :
a) -2x-(x-17)=34-(-x+25)
-2x - x +17 =34 + x -25
-3x + 17 =9 +x
-3x + 17 - 9 -x=0
-4x + 8 = 0
-4x = -8
x =2
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\(17x-\left(-16x-37\right)=2x\)\(+43\)
\(\Rightarrow17x+16x+37=2x+43\)
\(\Rightarrow17x+16x-2x=43-37\)
\(\Rightarrow31x=6\)
\(\Rightarrow x=\frac{6}{31}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a, => 3x-6-2x-10=5-2x
=> x-16=5-2x
=> x+2x=5+16
=> 3x=21
=> x=21:3=7
b, => 12x-12-5x-15=17-16x
=> 7x-27=17-6x
=> 7x+6x=17+17
=> 13x=39
=> x=39:13=3
Tk mk nha
a) 3(x-2) - 2(x+5) = 5 - 2x
\(\Rightarrow\) 3x - 6 - 2x - 10 = 5 - 2x
\(\Rightarrow\) x -16 = 5 - 2x
\(\Rightarrow\) x + 2x = 5 + 16
\(\Rightarrow\) 3x = 21
\(\Rightarrow\) x = 21 : 3
\(\Rightarrow\) x = 7
b, 12(x-1) - 5(x+3) = 17 - 16x
\(\Rightarrow\) 12x - 12 - 5x - 15 = 17 - 16x
\(\Rightarrow\) 7x - 27 = 17 - 16x
\(\Rightarrow\) 7x + 16x = 17 + 27
\(\Rightarrow\) 23x = 49
\(\Rightarrow\) x = \(\frac{49}{23}\)
c) 4(x\(\pm\)2) < 0
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