Răspuns :
Răspuns:
a) 65:5+a•3-39:13 = 78
13+3a-3 = 78
10+3a = 78
3a = 78-10
3a = 68
a = 68/3 → = 22,(6)7.
EVERGREEN
Răspuns:
[tex]\bf 65 : 5 + a\cdot 3 - 39 : 13 = 78[/tex]
[tex]\bf 13 + a\cdot 3 - 39 : 13 = 78[/tex]
[tex]\bf 13 + a\cdot 3 - 3 = 78[/tex]
[tex]\bf a\cdot 3 - 3 = 78-13[/tex]
[tex]\bf a\cdot 3 - 3 = 65[/tex]
[tex]\bf a\cdot 3 = 65+3[/tex]
[tex]\bf a\cdot 3 = 68[/tex]
[tex]\bf a\cdot 3 = 68[/tex]
[tex]\bf a = 68 :3[/tex]
[tex]\bf a=22,6[/tex]