document.write( "Question 238591: (-2,r),(6,7),m=1/2 \n" ); document.write( "
Algebra.Com's Answer #175286 by user_dude2008(1862)\"\" \"About 
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(7-r)/(6--2)=1/2\r
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\n" ); document.write( "\n" ); document.write( "(7-r)/(8)=1/2\r
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\n" ); document.write( "\n" ); document.write( "2(7-r)=8\r
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\n" ); document.write( "\n" ); document.write( "14-2r=8\r
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\n" ); document.write( "\n" ); document.write( "-2r=-6\r
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\n" ); document.write( "\n" ); document.write( "r=3 <--------------- Answer
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