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2014-07-09T18:27:52+03:00
11/(2x+45)⇒2x+45=55⇒2x=10⇒x=5∈N
2x+45=66⇒2x=21⇒x∉N
2x+45=77⇒2x=32⇒x=16∈N
2x+45=99⇒2x=54⇒x=27∈N
2x+45=121⇒2x=76⇒x=38∈N
A={5,16,27,38}

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