Question

O persoana are o suma de bani. Dupa ce a cheltuit 192 de lei a ramas cu 60% din suma pe care a avut-o la inceput. Suma pe care a avut-o a fost egala cu ?

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Answer 1

$x \to suma \ initiala \\\\\\ x-192 \to restul \\\\ x-192= 60\% \ din \ x \\\\ x-192=\frac{\not 60}{\not 100} * x \\\\ x-192= \frac{3}{5} * x \\\\ x^{(5}-192^{(5}=\frac{3x}{5} \\\\ 5x-192*5=3x \\\\ 5x-3x=192*5 \\\\ 2x=192*5 \\\\ x= \frac{\not 192*5}{\not 2} \\\\\ x= 96*5 \\\\ \boxed{x \to 480 \ lei }$