y x 3/4 = 1 - 2/5
y x 3/4 = 3/5
y = 3/5 : 3/4
y = 4/5
\(y\times\dfrac{3}{4}+\dfrac{2}{5}=1\)
\(\Leftrightarrow y\times\dfrac{3}{4}=1-\dfrac{2}{5}\)
\(\Leftrightarrow y\times\dfrac{3}{4}=\dfrac{3}{5}\)
\(\Leftrightarrow y=\dfrac{3}{5}:\dfrac{3}{4}\)
\(\Leftrightarrow y=\dfrac{3}{5}\times\dfrac{4}{3}\)
\(\Leftrightarrow y=\dfrac{4}{5}\)
y x \(\dfrac{3}{4}+\dfrac{2}{5}=1\)
y x \(\dfrac{3}{4}=1-\dfrac{2}{5}\)
y x \(\dfrac{3}{4}=\dfrac{3}{5}\)
y\(=\dfrac{3}{5}:\dfrac{3}{4}\)
y\(=\dfrac{4}{5}\)
y x\(\dfrac{3}{4}\)= 1- \(\dfrac{2}{5}\)
y x \(\dfrac{3}{4}\) = \(\dfrac{3}{5}\)
y = \(\dfrac{3}{5}\) : \(\dfrac{3}{4}\)
y = \(\dfrac{4}{5}\)
y x 3/4 = 1 - 2/5
y x 3/4 = 3/5
y = 3/5 : 3/4
y = 4/5