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2014-10-02T12:11:55+03:00
Xy+xz=126
x=5

x(y+z)=126
5(y+z)=126
y+z=126:5
y+z=25.2
2 3 2
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2014-10-02T12:16:00+03:00
Xy+xz=126,x(y+z)=126
x=5
y+z=126/5=25,2