SOLUTION: i need help with the following proof. Ive put it into a link can someone explain it please? http://www2.edmastery.com/li/itemAssets/nnds

SOLUTION: i need help with the following proof. Ive put it into a link can someone explain it please? http://www2.edmastery.com/li/itemAssets/nnds_li%20-%20production%5Cdmeyer%5C16.bmp

Question 252317: i need help with the following proof. Ive put it into a link
can someone explain it please?
http://www2.edmastery.com/li/itemAssets/nnds_li%20-%20production%5Cdmeyer%5C16.bmp
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
When you have and you want to solve for 'x', the next step would be to add 84 to both sides to get which then becomes . The property that you are using here is the addition property of equality. So the answer is C)
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