+0  
 
0
1501
1
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solve: 7(9+k)=84

 Aug 31, 2015
 #1
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0

7(9+k) = 84

 

= 7 x 9 = 63 

= 84 - 63

= 21/7

= 3

 

= 7(9+3) = 84

 Aug 31, 2015

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