Question

Daca x/y = 0,6 , determinati rapoartele :

a) x+y / 3x+y ; b) x+y / 7x - y ; c) x-y / x+7y .

Answer 1

x/y=0,6=6/10=3/5 => x/3 = y/5 =k    adica x=3k  si  y=5k  inlocuim aceste valori in rapoartele date si efectuam calculele ...
a)  (3k+5k) / (3*3k+5k)=8k / 14k = 8/14 = 4/7 ;
b)  (3k+5k) / (7*3k-5k)=8k / 16k  = 1/2 ;
c)  (3k-5k) / (3k+7*5k)= -2k / 38k= - 1/19 ;