document.write( "Question 369460: Photocopying. Copy recently charged 49¢ per page for color copies and 7¢ per page for black-and-white copies. If Mikes bill for 90 copies was $11.34, how many copies of each type were made? \n" ); document.write( "
Algebra.Com's Answer #263275 by amoresroy(361)\"\" \"About 
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Photocopying. Copy recently charged 49¢ per page for color copies and 7¢ per page for black-and-white copies. If Mikes bill for 90 copies was $11.34, how many copies of each type were made?\r
\n" ); document.write( "\n" ); document.write( "Let c = no. of color copies
\n" ); document.write( " 90-c = no. of black-and-white copies\r
\n" ); document.write( "\n" ); document.write( ".49c + .07(90-c) = 11.34
\n" ); document.write( ".49c + 6.3 - .07c = 11.34
\n" ); document.write( ".49c - .07c = 11.34 - 6.3
\n" ); document.write( " .42c = 5.04
\n" ); document.write( " c = 12\r
\n" ); document.write( "\n" ); document.write( " 90-c = 78\r
\n" ); document.write( "\n" ); document.write( "There are 12 color copies and 78 black-and-white copies
\n" ); document.write( " \n" ); document.write( "
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