Question

ionut cheltuieste o suma de bani astfel prima data 2 supra 5 din suma, a doua oara 5 supra 6 din rest, ramanandu i 5 lei. Ce suma a avut/

Answer 1

$x- \frac{2}{5} *x- \frac{5}{6} *(x- \frac{2}{5} *x)=5\\ \frac{3}{5} *x- \frac{5}{6} * \frac{3}{5} *x=5\\ \frac{3}{5} *x- \frac{1}{2} *x=5|*10\\6*x-5*x=50\\x=50$