\(a,\dfrac{7}{8}+x=\dfrac{3}{5}\\ \Rightarrow x=-\dfrac{11}{40}\\ b,\dfrac{1}{3}:\left(2x-1\right)=\dfrac{-4}{24}\\ \Rightarrow2x-1=\dfrac{1}{3}:\dfrac{-1}{4}\\ \Rightarrow2x=\dfrac{-4}{3}+1\\ \Rightarrow x=\dfrac{-1}{3}:2\\ \Rightarrow x=\dfrac{-1}{6}\)
\(c,\dfrac{17}{2}-\left|x-\dfrac{3}{4}\right|=\dfrac{-7}{4}\\ \Rightarrow\left|x-\dfrac{3}{4}\right|=\dfrac{41}{4}\\ \Rightarrow\left[{}\begin{matrix}x-\dfrac{3}{4}=\dfrac{41}{4}\\x-\dfrac{3}{4}=\dfrac{-41}{4}\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=11\\x=\dfrac{-19}{2}\end{matrix}\right.\)
\(d,\left(3x+2\right)\left(\dfrac{-2}{5}x-7\right)=0\\ \Rightarrow\left[{}\begin{matrix}3x+2=0\\\dfrac{-2}{5}x-7=0\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}3x=-2\\\dfrac{-2}{5}x=7\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=-\dfrac{2}{3}\\x=\dfrac{-35}{2}\end{matrix}\right.\\ \)
a: x+7/8=3/5
=>x=3/5-7/8=24/40-35/40=-11/40
b: 1/3:(2x-1)=-4/24=-1/6
=>2x-1=-2
=>2x=-1
hay x=-1/2
c: =>|x-3/4|=17/2+7/4=41/4
=>x-3/4=41/4 hoặc x-3/4=-41/4
=>x=11 hoặc x=-19/2
