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(6x7)+(?-6)=60

Guest Mar 1, 2017
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(6x7)+(?-6)=60      simplify

 

42 + ( ? - 6)   = 60     subtract  42 from each side

 

? - 6   =   18        add 6 to both sides

 

?     =   24

 

 

cool cool cool

CPhill  Mar 1, 2017

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