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{[(×+2)×2+2]×2+2}×2+2=30

Răspuns :

{[(x+2)×2+2]×2+2}×2=30-2=
{[(x+2)×2+2]×2+2}×2=28=
{[(x+2)×2+2]×2+2}=28:2=
{[(x+2)×2+2]×2+2}=14
[(x+2)×2+2]×2=14-2=
[(x+2)×2+2]×2=12=
[(x+2)×2+2]=12:2=
[(x+2)×2+2]=6=
(x+2)×2=6-2=
(x+2)×2=4=
x+2=4:2=
x+2=2=
x=2-2=
x=0