Salut!
Răspuns: 2000 8 ✅
[tex] \bf{1)x - x \times 20\% = {}^{10)} x - \frac{20x {}^{(10} }{100} = \frac{10x - 2x}{10} = \frac{8x}{10} } [/tex]
[tex] \bf{2) \frac{8x}{10} - \frac{8x}{10} \times 10\% = \frac{ {}^{10)} 8x}{10} - \frac{8x}{10} \times \frac{10 {}^{(10} }{100} = \frac{80x - 8x}{100} = \frac{72x}{100} }[/tex]
[tex] \bf{\frac{72x}{100} = 1440} \\ \bf{72x = 1440 \times 100} \\ \bf{72x = 144000} \\ \bf{x = 144000 \div 72} \\ \bf{ \boxed{x = 2000 \: lei} } [/tex]
