document.write( "Question 813414: An art dealer bought 12 etchings for $375. He sold some of them at $35 each and the rest at $40 each, making a profit of $80 on the transaction. How many etchings did he sell at each price? \n" ); document.write( "
Algebra.Com's Answer #489679 by richwmiller(17219)\"\" \"About 
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x+y=12,
\n" ); document.write( "35x+40y=375+80
\n" ); document.write( "x = 5 at 35 , y = 7 at 40
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