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Aflati X:
{21-[17-(2x+1):3]:2+6}·2-17=23


Răspuns :

Desfacem paranteze
{21-[17-2x/3+1/3]:2+6}*2-17=23
(21-17/2-2x/6+1/6+6)*2-17=23
54-34/2-4x/6+2/6+12-17=23
54-17-(4x+2)/6+12-17=23
32-(4x+2)/6=23
(4x+2)/6=55
4x+2=55*6
4x+2=330
4x=328
x=82