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x:y=y:z=2
x+y+z=700
afla z,y,z


Răspuns :

x: y= 2
y:z= 2
y= 2z
x=2y= 2 x 2y = 4z
 x + y+ z = 700
4z+ 2z + z= 700
7z= 700
z= 700:7
z= 100
y= 100 x 2 =200
x= 200 x 2 =400