document.write( "Question 495527: twenty-one less than the product of seven and the difference of a number and one is three times the number. what is the number? \n" ); document.write( "

Algebra.Com's Answer #336105 by Earlsdon(6294) $\"\"$ $\"About$

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If n is the required number, the problem can be expressed as:
\n" ); document.write( " $\"7%2A%28n-1%29-21+=+3n\"$ Simplify and solve for n.
\n" ); document.write( " $\"7n-7-21+=+3n\"$
\n" ); document.write( " $\"7n-28+=+3n\"$ Add 28 to both sides.
\n" ); document.write( " $\"7n+=+28%2B3n\"$ Subtract 3n from both sides.
\n" ); document.write( " $\"4n+=+28\"$ Divide both sides by 4.
\n" ); document.write( " $\"n+=+7\"$
\n" ); document.write( "The number is 7. \n" ); document.write( "

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