Question

cât mai repede posibil vă rog frumos

Answer 1

$\frac{x}{3} =\frac{y}{4} =\frac{z}{6} =k$

$x=3k\ y=4k \ z=6k$

$2*3k-4k+3*6k=40$

$6k-4k+18k=40$

$20k=40$

$k=2$

$x=6$

$y=8$

$z=12$