Question

ma poate ajuta cineva ?

Answer 1

Notam:

x=economiile

excursie: $\frac{4}{9}$ × x

carti: $\frac{3}{5}$ × ($\frac{9}{9}$ - $\frac{5}{9}$) ×x

⇒ carti : $\frac{3}{5}$ × $\frac{5}{9}$ × x

⇒ carti : $\frac{1}{3}$ × x

$\frac{4}{9}$ × x + $\frac{1}{3}$ × x + 32 = x |×9 (scap de numitori)

4x + 3x + 288 = 9x

⇒ 2x = 288

⇒ x = 144

aflu cat a costat excursia:

excursie = $\frac{4}{9}$ × 144 = 64 (dolari)

Raspuns: excursia a costat 64 de dolari.