Question

determinati un numar, stiind daca la dublul acestuia adunam 2/5 obtinem 1,9. va rog ajutati.ma dau coronita

Answer 1

[tex]2* x + \frac{2}{5} = 1,9 [/tex]
$10*x + 2 = 9,5$
$10*x = 7,5$
$x= \frac{7,5}{10}$
$x= 0,75$