Question

daca x,y,z sunt direct proportionale cu 3,4,6,iar x+y+z=65, atunci x=?,y=?,z=?

Answer 1

{x;y;z}d.p{3,4,6} ------> $\frac{x}{3} = \frac{y}{4} = \frac{z}{6} =k$ ------->
----->x=3k ; y=4k ; z=6k
x+y+z=65
3k+4k+6k=65
13k=65
k=65:13
k=5 ------->>> x=15      y=20   z=40