Răspuns :

MrsMid

Răspuns:

Explicație pas cu pas:

1. a) x/4<5/2 => x/4<10/4 => x<10 (poate fi orice numar de exemplu x=9)

b)4/9>=x/9 => 4>=x (x=4)

c)28<x<30 (x=29)

2. a) ((3-17/7)7/2-3/21-15/35)*6/5

(4/7*7/2-3/21-15/35)*6/5

(2-3/21-15/35)*6/5

10/7*6/5

2/7*6

12/7

b) 1/21*21+4si 5/8

1+4 si 5/8

5 si 5/8

45/8

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