Question

Answer 1

( 3 - \(\dfrac{9}{10}\) - | x +2| ) : ( \(\dfrac{19}{10}\) - 1 - \(\dfrac{2}{5}\) ) + \(\dfrac{4}{5}\)   = 1

( \(\dfrac{21}{10}\) - | x +2| ) : \(\dfrac{1}{2}\) + \(\dfrac{4}{5}\) = 1

( \(\dfrac{21}{10}\) - |x+2|) x 2 = 1 - \(\dfrac{4}{5}\)

( \(\dfrac{21}{10}\) - |x +2| ) x 2  = \(\dfrac{1}{5}\)

\(\dfrac{21}{10}\) - | x +2| = \(\dfrac{1}{10}\)

       | x + 2 | = \(\dfrac{21}{10}-\dfrac{1}{10}\)

      | x + 2 | = 2 

        x  + 2  = 2 hoặc x + 2 = - 2

      x = 0 hoặc x = - 4