Answer
$x = 0.049$
Work Step by Step
$\frac{0.14}{1.8} = \frac{x}{0.63}$
$1.8x = 0.14\times0.63$
$\frac{1.8x}{1.8} = \frac{0.0882}{1.8}$
$x = 0.049$
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