Răspuns :

Stasbestplayerid

Răspuns:

45 de lei....40,5 : 90% ×100%

Kitty200704id

[tex]x - 10\%x = 40.5[/tex]

[tex]x - \frac{10x}{100} = 40.5[/tex]

[tex] \frac{100x}{100} - \frac{10x}{100} = 40.5[/tex]

[tex] \frac{90x}{100} = 40.5[/tex]

[tex]x = \frac{40.5 \times 100}{90} =\frac{40.5 \times 10}{9} = \frac{405}{9} = 45[/tex]

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