58-{3x+[(12x+15):3 +43]:4}:2= 42​

Răspuns :

-6
——
8
Cred,nu sunt sigura dar sper ca te am ajutat:)

Răspuns:

58-{3x+[(12x+15):3+43]:4}:2=42

58-{3x+[(12x+15):3+43]:4}= 84

3x+(12x+15:3+43):4= 26

3x+(12x+5+43)= 104

3x+(12x+48)=104

15x= 56

x+ 3,(1)