document.write( "Question 550902: a+b=s+r for s \n" ); document.write( "
Algebra.Com's Answer #359196 by jim_thompson5910(35256)\"\" \"About 
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a+b=s+r\r
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\n" ); document.write( "\n" ); document.write( "a+b-r=s+r -r\r
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\n" ); document.write( "\n" ); document.write( "a+b-r = s\r
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\n" ); document.write( "\n" ); document.write( "s = a+b-r
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