Question

Find x in each of the following proportions.
x:9::84:36​

Answer 1

Answer:

x/9=84/36

x=84/36×9

x=21

Answer 2

$\sf{ x: 9 : :84 :36 = \frac{x}{9} = \frac{84}{36} }$

$\sf{x \times 36 = 84 \times 9}$

$\sf{36x = 756}$

$\sf \large\fcolorbox{blue}{pink}{x = \frac{756}{36} = 21 }$