Question

determinati x,ysi z direct proportionale cu numerele 2 3 4 stind ca x+y+z=27

Answer 1

Răspuns:

$\frac{x}{2} + \frac{y}{3} + \frac{z}{4} = k$

$x + y + z = 27$

$x = 2k$

$y = 3k$

$z = 4k$

$2k + 3k + 4k = 27$

$9k = 27$

$k = 3$

x=2k=2×3=6

y=3k=3×3=9

z=4k=4×3=12

Răspuns: 6,9,12