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rezolva inecuatile. x+7mai mare sau egal cu10. x+21<4X6

Răspuns :

x+7>=10
x>=3
daca x apartine N, x={3,4,...}
daca x apartine R
x apartine [3,+ inf)
Star2905
x+7>=10 => x={ 3;4;5...}
x+12 <24 => x={11;10...}