Răspunsuri

2014-08-05T14:51:22+03:00
X/y=2/3

x=2y/3

(2x+5y)/(3x+8y)=  (2*2y/3 +5y)/(3*2y/3 +8y)=

=(4y/3 +5y)/(2y+8y)    aducem la acelasi numitor la numarator

=(4y+15y)/3/10y=

=19y/3 * 1/10y= 19/30