Răspunsuri

2014-07-10T20:49:30+03:00


x, y, z ip cu 2, 3, 4. => x*2=y*3=z*4 (*=ori) = K => x=k/2, y= k/3, z=k/4.
x+y+z=91

=> k/2  +k/3+ k/4 =91

18k/36 + 12k/36 +9k/36=91

=39k/36=91
39k=91*36
k=91*36/39 
k=84. 
x=84/2 =>42
y=84/3=>28
z=84/4=>21