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aflati x din: {2×[14+(5+x)÷6]-5}÷9+7=10

Răspuns :

Floaribogdan
{2×[14+(5+x)÷6]-5}=3×9
2×[14+(5+x)÷6]=27+5
14+(5+x)÷6=32÷2
14+(5+x)=16×6
5+x=96
x=96-5
x=91

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