Question

help bài 3 câu a ,b, và  c help

Answer 1

a) \(x+\dfrac{1}{4}=\dfrac{1}{5}\)

   \(x=\dfrac{1}{5}-\dfrac{1}{4}\)

  \(x=\dfrac{4}{20}-\dfrac{5}{20}\)

  \(x=-\dfrac{1}{20}\)

b) \(x-\dfrac{1}{5}=\dfrac{3}{20}\)

    \(x=\dfrac{3}{20}+\dfrac{1}{5}\)

    \(x=\dfrac{3}{20}+\dfrac{4}{20}\)

    \(x=\dfrac{7}{20}\)

c) \(\dfrac{5}{6}-x=1\)

           \(x=\dfrac{5}{6}-1\)

           \(x=\dfrac{5}{6}-\dfrac{6}{6}\)

          \(x=-\dfrac{1}{6}\)