Question

va rog mult poza contine problema dau coroana si puncte ​

Answer 1

Răspuns:

x=60

Explicație pas cu pas:

x-nr initial

x-2/3x=y

y-2/4y=z

z-2/5z=6

5/5z-2/5z=6

3/5z=6

z=6÷3/5=6•5/3=10

y-2/4y=10

4/4y-2/4y=10

2/4y=10

y=10÷2/4=10•4/2=20

x-2/3x=20

3/3x-2/3x=20

1/3x=20

x=20÷1/3=20•3=60