Răspuns :
x/y=2/3 =>x=2y/3
[(3•2y/3)+2y]/(2y/3 + 3y) =
4y : 11y/3 =
4y • 3/11y =
12/11
[(3•2y/3)+2y]/(2y/3 + 3y) =
4y : 11y/3 =
4y • 3/11y =
12/11
Răspuns
( 3 x + 2 y ) / ( x + 3 y ) = 12 / 11
Explicație pas cu pas:
x / y = 2 / 3 ⇒ 2 y = 3 x ⇒ y = 3 x / 2
( 3 x + 2 y ) / ( x + 3 y ) = 12 / 11
= ( 3 x + 2 × 3 x / 2 ) / ( x + 3 × 3 x / 2 ) =
= 6 x / ( 2 x / 2 + 9 x / 2 ) =
= 6 x / (11 x / 2)=
= 6 x : (11 x / 2) =
= 6 x · (2 / 11 x) =
= 12 / 11