SOLUTION: What linear expression would you add to -10X + 7 to have a sum of X?

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Question 1067718: What linear expression would you add to -10X + 7 to have a sum of X?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
-10x+7+y=x
y=11x-7; that is what needs to be added.