Question

(5/7 - y) * 14/5= 7/ 10 + 1/2

 

Answer 1

(5/7-y)x14/5=6/5

5/7-y=6/5:14/5

5/7-y=3/7

y=5/7-3/7

x=2/7

Answer 2

Ta có : \(\left(\frac{5}{7}-y\right)\times\frac{14}{5}=\frac{7}{10}+\frac{1}{2}\)

\(\Rightarrow\left(\frac{5}{7}-y\right)\times\frac{14}{5}=\frac{12}{10}=\frac{6}{5}\)

\(\Rightarrow\left(\frac{5}{7}-y\right)=\frac{6}{5}:\frac{14}{5}\)

\(\Rightarrow\left(\frac{5}{7}-y\right)=\frac{30}{70}=\frac{3}{7}\)

\(y=\frac{5}{7}-\frac{3}{7}=\frac{2}{7}\)

 

Answer 3

theo mình là 2/7