#### Answer

$x=5$

#### Work Step by Step

We are given the proportion $\frac{x}{6}=\frac{15}{18}$. We can setting the cross products equal to each other and solve for the unknown variable.
$x\times18=6\times 15$
$18x=90$
Divide both sides by 18.
$x=5$

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Pearson

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$x=5$

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