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a fost răspuns

va rog ajutati-ma cu exercitiu asta 63+{9·[18+(2X-4)÷2]}·3=576

Răspuns :

Aureliachita
63+{9x[18+(2X-4):2]}x3=576
{9x[18+(2X-4):2]}x3=576-63
{9x[18+(2X-4):2]}x3=513
{9x[18+(2X-4):2]}=513:3
[9x(18+2X-4:2)]=171
18+2X-4:2=171:9
18+2X-4:2=19
18+2X-2=19
2X-2=19-18
2X-2=1
2X=1+2
2X=3
X=1,5