y : 1/4 = 1 - 3/7
y : 1/4 = 4/7
y = 4/7 x 1/4
y = 1/7
\(y:\dfrac{1}{4}=\dfrac{1}{1}-\dfrac{3}{7}\)
\(y:\dfrac{1}{4}=\dfrac{7-3}{7}=\dfrac{4}{7}\)
\(y=\dfrac{4}{7}.\dfrac{1}{4}\)
\(y=\dfrac{4}{7}\)
\(y\div\dfrac{1}{4}=1-\dfrac{3}{7}\)
\(y\div\dfrac{1}{4}=\dfrac{4}{7}\)
\(y=\dfrac{4}{7}\cdot\dfrac{1}{4}\)
\(y=\dfrac{1}{7}\)
\(y\div\dfrac{1}{4}=1-\dfrac{3}{7}\)
\(y\div\dfrac{1}{4}=\dfrac{4}{7}\)
\(y=\dfrac{4}{7}\times\dfrac{1}{4}\)
\(y=\dfrac{1}{7}\)
Giải đầy đủ giúp mik nhé
