Question

Умоляю помогите пожалуйста

Answer 1

$\displaystyle \tt \bigg(\frac{2}{5}x-2\frac{2}{3}\bigg)\cdot15=2\\\\ \displaystyle \tt \bigg(\frac{2}{5}x-\frac{8}{3}x\bigg)\cdot15=2\\\\ \displaystyle \tt 6x-40=2\\\\ \displaystyle \tt 6x=2+40\\\\ \displaystyle \tt 6x=42\\\\ \displaystyle \tt \underline{\bold{x=7}}$