document.write( "Question 170830: What number must you add to 128 and subtract from 256 so that the answers to both examples are equal? \n" ); document.write( "
Algebra.Com's Answer #126133 by Mathtut(3670)\"\" \"About 
You can put this solution on YOUR website!
lets call the number x
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\n" ); document.write( "128+x=256-x
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\n" ); document.write( "2x=128
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