Jojo215
Jojo215
21-07-2015
Mathematics
contestada
Is 12a-a simplified?
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Аноним
Аноним
21-07-2015
12a−a
=12a−1a
=12a+−1a
=a+a+a+a+a+a+a+a+a+a+a+a+−a
=a+a+a+a+a+a+a+a+a+a+a
=11a
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