Question

Problema 5 .....ofer si corona

Answer 1

Răspuns:

Explicație pas cu pas:

P = pretul initial

P*90/100*90/100 = 162

P = 162*100*100/(90*90) = 200 lei

Answer 2

x-pret initial

$x \times \frac{10}{100} = \frac{1}{10} x$

$x - \frac{1}{10}x = \frac{9}{10} x$

(prima reducere)

$\frac{9}{10} x \times \frac{10}{100} x = \frac{9}{100} x$

$\frac{9}{10} x - \frac{9}{100} x = \frac{81}{100} x$

(a doua reducere)

Pretul initial:

$\frac{81}{100} x = 162 = > x = \frac{162 \times 100}{81} = 200$

pret initial:200 lei