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10,81u * 100% = 5u * x% + 11u * (100%-x%)
10,81u·100% =5u·x%+11u·(100%-x%) /:%
10,81u·100=5u·x+11u(100-x)
1081u =5ux+1100u -11ux
1081u-1100u=5ux-11ux
-19u=-6ux /: u
-19=-6x /:(-6)
x=19/6=3⅙
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10,81u·100% =5u·x%+11u·(100%-x%) /:%
10,81u·100=5u·x+11u(100-x)
1081u =5ux+1100u -11ux
1081u-1100u=5ux-11ux
-19u=-6ux /: u
-19=-6x /:(-6)
x=19/6=3⅙