bubble2
bubble2
10-02-2015
Mathematics
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20% of what number is 39
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Аноним
Аноним
11-02-2015
[tex]\begin{array}{ccc}100\%&-&x\\\\20\%&-&39\end{array}\ \ \ |cross\ multiply\\\\\\20x=100\cdot39\\\\20x=3900\ \ \ \ |divide\ both\ sides\ by\ 20\\\\\boxed{x=195}[/tex]
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