Question

Numerele x,y,z sunt direct pprportionale cu 2,3,5aflati numerele daca suma lor este 180​

Answer 1

(x,y,z) d.p. (2,35)

$\frac{x}{2} = \frac{y}{3} = \frac{z}{5} = k$

x=2k

y=3k

z=5k

x+y+z=180

2k+3k+5k=180

10k=180

k=180:10

k=18

x=2k=2•18=36

y=3k=3•18=54

z=5k=5•18=90

Raspuns: x=30, y=54, z=90