Question

$\frac{x}{0.8} = \frac{15}{4}$
помогите пожалуйста!​

Answer 1

$\displaystyle \frac{x}{0,8}=\frac{15}{4}\\\\ \frac{x}{\frac{4}{5} }=\frac{15}{4}\\\\ \frac{5x}{4}=\frac{15}{4}\\\\ 5x=15\\x=3$