document.write( "Question 835115: Marginal Revenue (MR)=$130
\n" ); document.write( "Total Cost (TC)=$1,100+135Q+0.6Q^2
\n" ); document.write( "Marginal Cost(MC)=135+1.2Q
\n" ); document.write( "P=MR=MC
\n" ); document.write( "Therefore, $130=135+1.2Q
\n" ); document.write( "$130-135=135-135+1.2Q
\n" ); document.write( "-5=1.2Q
\n" ); document.write( "-5/1.2=1.2Q/1.2
\n" ); document.write( "-4.17=Q
\n" ); document.write( "Did I do this correctly?
\n" ); document.write( "Thank you, -Amanda Thomas\r
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Algebra.Com's Answer #503371 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
Yes, \"Q=-4.17\" is the correct answer to \"1.2Q%2B135=130\"
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