document.write( "Question 358886: a boy is 5 years older than his sister. write a variable
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Algebra.Com's Answer #256075 by neatmath(302)\"\" \"About 
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Let b be the boy's age.
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\n" ); document.write( "\n" ); document.write( "\"b=s%2B5\"
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\n" ); document.write( "\n" ); document.write( "or alternatively
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\n" ); document.write( "\n" ); document.write( "\"b-5=s\"
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\n" ); document.write( "\n" ); document.write( "The two equations are equivalent.
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\n" ); document.write( "\n" ); document.write( "In both cases, you can easily see that the sister needs to add 5 years to equal her brother's age.
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\n" ); document.write( "\n" ); document.write( "I hope this helps!
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