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What is the answer because I don’t understand

What is the answer because I don’t understand-example-1
User Ruan
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1 Answer

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Answer: 12a-a (hope this helps :)

=12a-1a

=12a+-1a

=a+a+a+a+a+a+a+a+

=a+a+a+a+a+a+a+a+

=11A

User Wkschwartz
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