Please teach me how to do this

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Rajit asked Jan 5, 2023

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45 votes

Please teach me how to do this

Mathematics
high-school

Rajit asked Jan 5, 2023

by Rajit

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1 Answer

19 votes

Check the picture below.

$\cfrac{18}{18+x}~~ = ~~\cfrac{19.2}{38.4}\implies \cfrac{18}{18+x}~~ = ~~\cfrac{19.2}{2(19.2)}\implies \cfrac{18}{18+x}~~ = ~~\cfrac{1}{2} \\\\\\ 36=18+x\implies 18=x$

Anzhelika answered Jan 9, 2023

by Anzhelika

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