Question

4. O persoana a cheltuit in prima zi 1\4 din banii sai a doua zi 3\5 din rest si i-au ramas 12,3 lei. Ce suma a avut la inceput?

Answer 1

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Answer 2

[tex]Notam\ x=suma\ initiala\\ \frac{x}{4}+\frac{3}{5}(x-\frac{x}{4})+12,3=x\\ \\ \frac{x}{4}+\frac{3}{5}\cdot \frac{3x}{4}+12,3=x\\ \\ \frac{x}{4}+\frac{9x}{20}+12,3=x|\cdot 20\\ 5x+9x+246=20x\\ 14x+246=20x\\ 6x=246\Rightarrow \bold{x=41\ lei}[/tex]