là như vầy
y x 7/16 - y x 5/8 = 2
hay y x 7/16 + y x 5/8 = 2
\(y\times\left(\dfrac{7}{16}+\dfrac{5}{8}\right)=2\)
\(y\times\dfrac{17}{16}=2\)
\(y=2\times\dfrac{16}{17}\)
\(y=\dfrac{32}{17}\)
\(=>y=2:\left(\dfrac{7}{16}+\dfrac{5}{8}\right)=2:\dfrac{17}{16}=\dfrac{32}{17}\)
mg giúp mk nhanh đc ko mk đang cần rất gấpppp