Question

Ajutați-mă va rog, repede ​

Answer 1

Răspuns:

2,5x=0,5y=5z=k

x=2,5k

y=0,5k

z=5k

2,5k+0,5k+5k=78

8k=78=>k=78:8=>k=9,75

x=2,5·9,75=>x=24,375

y=0,5·9,75=>y=4,875

x=5·9,75=>z=48,75