Question

Dau coroana!!! VA ROG MULT AJUTATI MA LA ACEASTA PROBLEMA!! Dacă x supra y=0,(4) calculati valoarea 5x+3y supra 11y-4x !!!

Answer 1

Răspuns:

x/y=0,(4)=>x/y=4/9=>x=4y/9

(5x+3y) / (11y-4x)=

( 5·4y/9+3y) / (11y-4·4y/9)=

(20y/9+⁹⁾3y) / (⁹⁾11y-16y/9)=

(20y+27y)/(99y-16y)=

47y/83y=47/83

Answer 2

x/y = 0,(4)

0,(4) = 4/9

x/y = 4/9=> 4y = 9 x

(5x + 3y ) / (11 y - 4x ) ( * 4

(20 x + 12 y ) / ( 44 y - 16 x )

(20x  + 9 * 3x ) / ( 44 y - 16 x )

(20 x + 27 x ) / ( 99 x - 16 x )

47 x / 83 x = 43 / 83