[tex]x+ \frac{10x}{100}- \frac{10x}{100}(x+ \frac{10x}{100)}=1980 [/tex]
simplificam cele 3 fractii care au 10 la numarator prin 10
[tex]x+ \frac{x}{10}- \frac{1}{10}(x+ \frac{x}{10})=1980 [/tex]
[tex]x+ \frac{x}{10}- \frac{x}{10}- \frac{x}{100}=1980 [/tex]
[tex]x- \frac{x}{100}=1980 [/tex]
amplificam x si 1980 cu 100[tex] \frac{100x}{100}- \frac{x}{100}= \frac{198000}{100} [/tex]
[tex]100x-x=1980000[/tex]
[tex]99x=198000[/tex]
[tex]x=198000:99[/tex]
[tex]x=2000[/tex] lei a fost pretul initial al T.V-ului
