Question

ex7 si 10 va rog frumos ​

Answer 1

Răspuns:

Explicație pas cu pas:

7a)

7/2 + x = 49/4

x = 49/4 - 7/2 = 49/4 - 14/4 = 35/4 = 8 3/4 (8 intregi si 3/4)

b)

9/2 - x = 7/3

x = 9/2 - 7/3 = 27/6 - 14/6 = 13/6 = 2 1/6

5x/2 = 19/4

20x = 38

x = 38/20 = 19/10 = 1 9/10 (sau 1,9)

d) nu se vede complet

____________

10.

11/12 - 7/36 = 33/36 - 7/36 = 26/36

5/6 - 26/36 = 30/36 - 26/36 = 4/36 = 1/9

5/51 * 1/9 : 25/72 = 5/51*1/9*72/25 = 8/255