Question

Determinati numerele x ,y,z direct proportionale cu 3,4 si 5 ,stiind ca 3z-2x-y=35

Answer 1

$\frac{x}{3} = \frac{y}{4} = \frac{z}{5} =k$
⇒x=3k
y=4k
z=5k
3z-2x-y=35
⇒15k-6k-4k=35
5k=35⇒k=7
⇒x=21, y=28, z=35