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Blacklemon4
a fost răspuns

"2×{[78+13×(6+x)]÷26-3}+11=2011

Răspuns :

2× {[78+13×(6+x)]÷26-3}=2011-11=2000
[78+13×(6+x)]÷26-3=2000÷2=1000
[78+13×(6+x)]÷26=1000+3=1003
78+13×(6+x)=1003×26=26078
13×(6+x)=26078-78=26000
6+x=26000÷13=2000
x=2000-6
x=1994

Sper ca te-am ajutat .

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