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a fost răspuns

6) Aflati nr natural x stiind ca 2x-1/8 < 5/6.
7) Sa se calculeze: 15/10 • ( 5/3 - 5/9 • 6/10 + 7/12).

Răspuns :

2x-1/8<5/6
2x<5/6+1/8
2x<46/48
x<23/24

15/10 • ( 5/3 - 5/9 • 6/10 + 7/12)=3/2 * (5/3 - 30/90 +7/12) = 3/2* (5/3 - 1/3 +7/12)
3/2 * (4/3 + 7/12) = 3/2 * 23/12 = 69/24 = 23 / 8

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