Question

b.Daca x/4=y/5=z/6 si x+y+z=15, determinati nr x,y si z.
c. Daca x/5=y/7 si x+y = 24, determinati numerele x si y.

Answer 1

a)
$\frac{x}{4}= \frac{y}{5} = \frac{z}{6} =k$
x=4k
y=5k
z=6k
x+y+z=15
4k+5k+6k=15
15k=15
k=1
x=4
y=5
z=6
c)
$\frac{x}{5} = \frac{y}{7} =k$
x=5k
y=7k
x+y=24
5k+7k=24
12k=24
k=2
x=10
y=14