document.write( "Question 308632: 7+n=21 \n" ); document.write( "
Algebra.Com's Answer #220664 by mananth(16946)\"\" \"About 
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7+n =21
\n" ); document.write( "Add -7 to both sides of the equation
\n" ); document.write( "-7+7+n = 21-7
\n" ); document.write( "n=14
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