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a+3-1*3+2-4+0*1=0 a=2, but how?

 Jan 22, 2017
 #1
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a+3-1*3+2-4+0*1=0 a=2, but how?

 

a+3-3+2-4=0

           a-2=0  |+2

              a=2

 

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 Jan 22, 2017

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