Question

stiind ca x/y=0,(4) unde x si y sunt numere reale nenule, valoarea raportului 7x+4y/5x-2y=​

Answer 1

Răspuns:

x/y=4/9    ;     (7 x 4+4 x 9)/(5 x 4-2 x 9)=(28+36)/(20-18)=64/2=32

Explicație pas cu pas:

Answer 2

x/y=0,(4)

x/y=4/9

9x=4y

x=4y/9

(7x+4y)/(5x-2y)=

=(7*4y/9+9*4y/9)/(5*4y/9-9*2y/9)

=(28y/9+36y/9)/(20y/9-18y/9)

=(64y/9)/(2y/9)

=64y/9*9/2y

=64y/2y

=64/2

=32