Question

Gasiti nr. x,y,z care sunt direct proportionale  cu numerele 3,5,7,stiind ca suma lor este egala cu 4875.

Answer 1

$\frac{x}{3} = \frac{y}{5}= \frac{z}{7} = \frac{x+y+z}{3+5+7}= \frac{4875}{15} =325 \\ x=325*3=975 \\ y=325*5=1625 \\ z=325*7=2275 \\ Verificare:x+y+z=975+1625+2275=4875$

Answer 2

x/3= y/5 = z/7 =4875/15
x/3= 4875/15 ⇔ x= 14625/15 ⇔ x=975
y/5 = 4875/15 ⇔ y=24375/15 ⇔ y=1625
z/7= 4875/15 ⇔ z=34125/15 ⇔ z=2275
Verificare: 975+1625+2275=4875