Răspunsuri

2014-08-17T21:31:12+03:00
0,(3)=3/9=1/3

(2a+3b)/(4b+15a)=1/3

3*(2a+3b)=1* (4b+15a)

6a +9b =4b +15a

-9a= -5b

9a = 5b

a/b= 5/9
7 4 7