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urgenta, ajutor:)))))))​

Urgenta Ajutor class=

Răspuns :

x/y = 1/2  ⇒2x=y

(3x+y) / (x+3y) =

(3x+2x) /  (x+6x) =

5x / 7x= 5/7

x/y = 1/2 => y = 2x

(3x + y)/(x + 3y) =

inlocuim

= (3x + 2x)/(x + 6x)

= 5x/7x

= 5/7