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01-09-2015
Mathematics

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5n+9=2n solve equation

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Аноним Аноним

01-09-2015

5n+9=2n

5n+9−2n=2n−2n

3n+9=0

3n+9−9=0−9

3n=−9

3n/3=−9/3

n=−3

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