Question

Am nevoie rapid de rezolvare, va roog la 2 și 3​

Answer 1

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

=>2k+3k+4k=45

K=45:9=>k=5=>

X=2k=10

Y=3k=15

Z=4k=20

A/5=b/6=c/7=k

=>a=5k

b=6k

c=7k

=>k=7k+6k+5k=360

=>k=360:18=20

B=6*20=120

C=7*20=140

A=5*20=100