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lolirdc

22.05.2020

Mathematics

X - width
2x - length

$2\cdot x+2\cdot2x=72\\
2x+4x=72\\
6x=72\\
x=12\\\\
A=x\cdot2x=2x^2\\
A=2\cdot12^2\\
A=2\cdot144\\
A=288
$

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