Question

tìm y

a) 7/2 -y : 4/5 = 3/4

b) 10/3 - 2/3 : y = 1/9

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Answer 1

\(\dfrac{7}{2}-y:\dfrac{4}{5}=\dfrac{3}{4}\)

       \(y:\dfrac{4}{5}\)   = \(\dfrac{7}{2}\) - \(\dfrac{3}{4}\)

       \(y:\dfrac{4}{5}=\dfrac{11}{4}\)

       \(y=\dfrac{11}{4}\times\dfrac{4}{5}\)

        \(y=\dfrac{11}{5}\) 

\(\dfrac{10}{3}-\dfrac{2}{3}:y=\dfrac{1}{9}\)

= \(\dfrac{2}{3}:y=\dfrac{10}{3}-\dfrac{1}{9}\)

= \(\dfrac{2}{3}:y=\dfrac{29}{9}\)

= \(y=\dfrac{2}{3}:\dfrac{29}{9}\)

=\(y=\dfrac{6}{29}\)