=>2/3:x=-7-1/3=-22/3
=>x=-2/3:22/3=-2/3*3/22=-1/11
\(\dfrac{1}{3}\)+\(\dfrac{2}{3}\):x=-7
\(\dfrac{2}{3}\):x=(-7)-\(\dfrac{1}{3}\)
\(\dfrac{2}{3}\):x=\(\dfrac{-22}{3}\)
x=\(\dfrac{2}{3}\):\(\dfrac{-22}{3}\)
x=\(\dfrac{-1}{11}\)
vậy x=\(\dfrac{-1}{11}\)
\(\dfrac{1}{3}+\dfrac{2}{3}:x=-7\\ \Rightarrow\dfrac{2}{3}:x=-7-\dfrac{1}{3}\\ \Rightarrow\dfrac{2}{3}:x=-\dfrac{21}{3}-\dfrac{1}{3}\\ \Rightarrow\dfrac{2}{3}:x=\dfrac{-22}{3}\\ \Rightarrow x=\dfrac{2}{3}:-\dfrac{22}{3}\\ \Rightarrow x=\dfrac{2}{3}\times-\dfrac{3}{22}\\ \Rightarrow x=-\dfrac{1}{11}\)