document.write( "Question 57067: if 18c2r=153*13c2r-5 what is the value of r? \n" ); document.write( "
Algebra.Com's Answer #38839 by tutorcecilia(2152)\"\" \"About 
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18c^r=153(13c^r-5)
\n" ); document.write( "18c^2=1989c^2r-765
\n" ); document.write( "18c^2+765=1989c^2-765+765
\n" ); document.write( "18c^2+765=1989c^2
\n" ); document.write( "18c^2-18c^2+765=1989c^2-18c^2
\n" ); document.write( "765=1989c^2-18c^2
\n" ); document.write( "765=1971c^2r
\n" ); document.write( "765/1971c^2=1971c^2r/1971c^2
\n" ); document.write( "765/1971c^2=r
\n" ); document.write( "85/219c^2=r
\n" ); document.write( ".
\n" ); document.write( "Check by plugging (85/219c^2=r) back into the original equation.\r
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