document.write( "Question 1173288: are these expressions equivalent? explain.\r
\n" ); document.write( "\n" ); document.write( "2w+1t, 2w+t, 3x+1, 3x\r
\n" ); document.write( "\n" ); document.write( "Explain when you must write the number 1, and when you do not need to.\r
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Algebra.Com's Answer #798496 by Edwin McCravy(20059)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "1 and 0 are special numbers.  \r\n" );
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document.write( "When you multiply by 1, you don't change what\r\n" );
document.write( "you're multiplying it by.\r\n" );
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document.write( "When you add 0, you don't change what\r\n" );
document.write( "you're adding it to.\r\n" );
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document.write( "When you multiply by 0, you do change what\r\n" );
document.write( "you're multiplying it by.\r\n" );
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document.write( "When you add 1, you do change what\r\n" );
document.write( "you're adding it to.\r\n" );
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document.write( "2w+1t and 2w+t are equivalent because MULTIPLYING by 1 does NOT change the value\r\n" );
document.write( "of t.\r\n" );
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document.write( "HOWEVER,\r\n" );
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document.write( "3x+1 and 3x are NOT equivalent because ADDING 1 DOES change the value of 3x.\r\n" );
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document.write( "Edwin
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