Question

Mă puteți ajuta vă rog frumos dau coroana​

Answer 1

Răspuns:

Explicație pas cu pas:

4/5 - a/10 = 7/10

8/10 - a/10 = 7/10

a/10 = 8/10 - 7/10 = 1/10

a = 1

______________

5/a + 4/3 = 17/9

5/a + 12/9 = 17/9

5/a = 17/9 - 12/9 = 5/9

a = 9

______________

11/12 + 5/a = 31/12

5/a = 31/12 - 11/12 = 20/12 = 5/3

a = 3

______________

a/3 + 13/18 = 19/18

a/3 = 19/18 - 13/18 = 6/18 = 1/3

a = 1