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rezolvare la exercitiul {2[14+(5+x):6]-5}:9+7=10

Răspuns :

NicolaMy
{2[14+(5+x)/1·1/6]-5}:9+7=10 
{2[14+(5+x)/6]-5}:9+7=10 
{2[(84+5+x)/6]-5}:9+7=10
{2[(89+x)/6]-5}:9+7=10
{(89+x)/3-5}:9+7=10 
{(89+x-15)/3}:9+7=10
{(74+x)/3}·1/9+7=10
(74+x)/27=10-7
(74+x)/27=3
(74+x)=3·27
74+x=81
x=81-74=>x=7
x=7