👤
Zlatan
a fost răspuns

Salut ! x/y = 3/7. Calculează 5x+7y/9x-3y.     Am uitat cum se făceau. Mulțumesc !

Răspuns :

Bunicaluiandrei

x/y=3/7      3y=7x       y=7x/3                                                                                                (5x+7y)/(9x-3y)=(5x+ 7.7x/3)/(9x-7x)=(5x+49x/3)/2x=(15x+49x)/3:2x=64x/3.1/2x=32/3

Alte intrebari