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Evaluate $4/x=(2x)/18$ , where $x>0$ ?

1 Answer

JS · MathFact-orials.blogspot.com

May 20, 2017

$x = 6$

Explanation:

FIrst, set up the ratio:

$4/x = (2x)/18$

Now, cross multiply:

$2x^2 = 72$
$x^2 = 36$
$x = pm sqrt(36)$

Since $x > 0$ ,
$x = 6$

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