Question

Vă rog mult ex 2 ( cel cu linia )
Dau coroana !

Answer 1

Răspuns:

Explicație pas cu pas:

(a + 2)/2 = 7/3

3(a + 2) = 2*7

3a + 6 = 14

3a = 14 - 6 = 8

a = 8/3

a)

a/2 = 8/3 : 2 = 4/3

b)

(a + 9)/5 = (8/3 +9)/5 = (8/3 + 27/3)/5 = (35/3)/5 = 35/15 = 7/3

c)

7/(a + 2) = 7/(8/3 + 2) = 7/(8/3 + 6/3) = 7/(14/3) = 7*4/14 = 4/2 = 2