document.write( "Question 919118: r+18=20 \n" ); document.write( "
Algebra.Com's Answer #557495 by Kiera-Krum(1)\"\" \"About 
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r+18=20
\n" ); document.write( "r+18-18=20-18
\n" ); document.write( "r+18-18 =2 ( Cross out the 18 )
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\n" ); document.write( "so the answer is (r=2)
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