Question

tìm x:

x/7=-6/14+8/21

Answer 1

\(\dfrac{x}{7}=\dfrac{6}{14}+\dfrac{8}{21}=\dfrac{17}{21}\)

\(\Rightarrow x=\dfrac{17\cdot7}{21}=\dfrac{17}{3}\)

Answer 2

Lộn đề :v

\(\dfrac{x}{7}=\dfrac{-6}{14}+\dfrac{8}{21}=\dfrac{-1}{21}\)

\(\Rightarrow x=\dfrac{-1\cdot7}{21}=-\dfrac{1}{3}\)