Question

Change the subject of the formula 2+ d+e/f=3d

Answer 1

given formula = $2+d+\frac{e}{f}= 3d$

we have to change the subject to e

solution :

$2+d+\frac{e}{f}= 3d$

taking LCM

$\frac{2f+df+e}{f}= 3d \\\\2f+df+e = 3df \\\\e = 3df - 2f-df \\\\\text {taking common f} \\\\ e = f(3d-2-d)$

hence , The formula becomes e = f( 3d -2-d)

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