\(\Leftrightarrow x-\dfrac{1}{4}=\dfrac{20}{27}\)
hay \(x=\dfrac{20}{27}+\dfrac{1}{4}=\dfrac{80}{108}+\dfrac{27}{108}=\dfrac{107}{108}\)
\(\Leftrightarrow x-\dfrac{1}{4}=\dfrac{20}{27}\Leftrightarrow x=\dfrac{1}{4}+\dfrac{20}{27}=\dfrac{107}{108}\)
x - \(\dfrac{1}{4}\) = \(\dfrac{20}{27}\)
x = \(\dfrac{20}{27}+\dfrac{1}{4}\)
x = \(\dfrac{107}{108}\)