Question

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Answer 1

Răspuns:

Explicație pas cu pas:

9.

1,(3) = 1 + 3/9 = 1 + 1/3 = 4/3

2N/3 = 8 + 4/3 = 24/3 + 4/3 = 28/3

N = 28/3*3/2 = 14

_____________

10.

0,(6) = 6/9 = 2/3

1,5 = 15/10 = 3/2

3N/4 = 3/2 - 2/3 = 9/6 - 4/6 = 5/6

N = 5/6 *4/3 = 20/18 = 10/9

Answer 2

Răspuns:

2x/3=8+1,(3)

1,(3)=(13-1)/9=12/9=4/3

2x/3=8+4/3 aducem la acelasi numitor

2x=24+4

2x=28=>x=28:2=>x=14

__________

3x/4=1,5-0,(6)

0,(6)=6/9=2/3

3x/4=1,5-2/3 aducem la acelasi numitor

9x=18-8

x=10/9=1,(1)