Giúp mình cau nay
2x-8=-6
GIÚP MINH
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15/8−4/9×6/8+1/6=15/8−24/72+1/6=15/8−1/3+1/6
=45/24−8/24+4/24=(45−8+4)/24=41/24
\(MSC:24\\ \dfrac{7}{8}=\dfrac{7\times3}{8\times3}=\dfrac{21}{24};\dfrac{12}{6}=\dfrac{12\times4}{6\times4}=\dfrac{48}{24}\)
a) 6/-x=x/-24
=> -x.x=6.-24
=>-x.x=-144
=>x=12 hay x=-12
b)9/x=-35/105
=>9/x=-1/3
=>x=9.3/-1=-27
=>x=-27
c)x-1/8=5/8
=>x=5/8+1/8
=>x=3/4
d)x-1/2-(3/2+x)=-2
=>-x+4/2=-2
=>-x/2=0
=>x=0
e)x+1/3=-12/5.10/6
x+1/3=-4
x=-4-1/3
x= -13/3
#YM
\(\left|16-x\right|-2x+8=-6\)
\(\left|16-x\right|=2x-14\left(x\ge7\right)\)
\(\Leftrightarrow\left[{}\begin{matrix}16-x=2x-14\\16-x=14-2x\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=14\left(N\right)\\x=-2\left(L\right)\end{matrix}\right.\)
\(S=\left\{14\right\}\)
\(ƯC\left(18,54\right)=Ư\left(18\right)=\left\{1;2;3;6;9;18\right\}\\ \Rightarrow x\in\left\{9;18\right\}\)
\(\left(y-\dfrac{2}{3}\right):\dfrac{4}{5}=\dfrac{5}{6}\)
\(y-\dfrac{2}{3}=\dfrac{5}{6}\times\dfrac{4}{5}\)
\(y-\dfrac{2}{3}=\dfrac{2}{3}\)
\(y=\dfrac{2}{3}+\dfrac{2}{3}\)
\(y=\dfrac{4}{3}\)
\(\dfrac{5}{9}=\dfrac{5x6}{9x6}=\dfrac{30}{54}\)
\(\dfrac{1}{6}=\dfrac{1x9}{6x9}=\dfrac{9}{54}\)
\(x\times\dfrac{3}{5}=\dfrac{2}{3}+\dfrac{1}{6}=\dfrac{5}{6}\)
\(x=\dfrac{5}{6}:\dfrac{3}{5}=\dfrac{25}{18}\)
2x - 8 = -6
=> 2x = -6 + 8 = 2
=> x = 2 : 2 = 1
2x-8=6
2x =6+8
2x =14
x =14:2
x =7
Vậy x=7