Question

so nguyen y thoa man y-5/7-y= 2/-3

Answer 1

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

\(\Rightarrow\left(y-y\right)=-\frac{2}{3}+\frac{5}{7}\)

\(\Rightarrow0=\frac{1}{21}\)(vô lý)

Vậy không có y nào thỏa mãn \(y-\frac{5}{7}-y=\frac{2}{-3}\)

Answer 2

\(\frac{y-5}{7-y}=\frac{2}{-3}\\ \Rightarrow-3\left(y-5\right)=2\left(7-y\right)\\ \Rightarrow-3y+15=14-2y\\ \)

\(=-3y+2y=-1\\ =-1y=-1\\ \Rightarrow y=1\)

Answer 3

y = 1 nha