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cum se rezolva exercitiul 2+2x{2+2x[2+2x(2-2:a)]}=22


Răspuns :

2+2{2+2[2+2(2-2÷a)]}=22
2{2+2[2+2(2-2÷a)]}=20
2+2[2+2(2-2÷a)]=10
2[2+2(2-2÷a)]=8
2+2(2-2÷a)=4
2(2-2÷a)=2
2-2÷a=1
2÷a=1
a=2