SOLUTION: What number must you add to 128 and subtract from 256 so that the answers to both examples are equal?

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Question 170830: What number must you add to 128 and subtract from 256 so that the answers to both examples are equal?
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
lets call the number x
:
128+x=256-x
:
2x=128
:
highlight%28x=64%29