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2014-05-13T14:54:48+03:00
X+y+z=76
x:y=5,4
x=5y+4
z:y=3=>z=3y

5y+4+y+3y=76
9y=76-4
9y=72
y=72:9
y=8

x=5*8+4
x=40+4
x=44

z=3*8
z=24

2 5 2