Question

3 si 4 va implor.................

Answer 1

Răspuns:

a/b=2/3=>a=2b/3

a+b=10

inlocuim pe a in relatie

2b/3+³⁾b=³⁾10

2b+3b=30=>b=30:5=>b=6

a=2b/3=>a=2·6:3=>a=4

_____________

x/y=1/3=>y=3x

(4x-y)/(y-x)= inlocuim pe y

(4x-3x)/(3x-x)=x/2x=1/2