Va rog ajutati-ma la problema a5

[tex]x - \frac{20}{100}x- \frac{10}{100} (x - \frac{20}{100} x)= x-84000 [/tex]
[tex]\frac{80}{100}x- \frac{10}{100}* \frac{80}{100}x=x-84000[/tex]
[tex]\frac{80}{100}x-\frac{8}{100}x =x-84000[/tex]
[tex]\frac{72}{100}x=x-84000[/tex]
[tex]\frac{28}{100}x=84000[/tex]
[tex]x=\frac{100}{28}*84000[/tex]
x = 300000