Question

Dau coroana si multumesc!

Answer 1

8.
x/3=y/5=z/10=k
x=3k
y=5k
z=10k
3k+5k+10k=72
18k=72 =>k=4
=>x=12
=>y=20
=>z=40

9.
5x/4=2y/5=4z/3=k
x=4k/5
y=5k/2
z=3k/4
4k/5 + 5k/2 + 3k/4 = 1
Numitor comun 20
16k+50k+15k=20
81k=20 =>k=20/81
=>x=16/81
=>y=50/81
=>z=15/81