Răspunsuri

2014-08-22T13:33:30+03:00


x/y= 2/5⇒ 2y=5x⇒y=5x/2= 2,5x

(2x+5y) /(3x+8y) =( 2x+12,5x) /(3x+20x) =14,5x/23x = 145/230 =29/46