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The parallelograms are similar. Find x.

The parallelograms are similar. Find x.-example-1

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(5)/(x)=((1)/(2))/(4)\\\\\\(5)/(x)=(1)/(2)\cdot(1)/(4)\\\\\\(5)/(x)=(1)/(8)\longrightarrow\boxed{x=40}

User Maksim Kostromin
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