document.write( "Question 874915: A merchant has two kinds of paint. If
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document.write( "9 gal of the inexpensive paint is mixed with 7 gal of the
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document.write( "expensive paint, the mixture will be worth $19.70 per
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document.write( "gallon. If 3 gal of the inexpensive paint is mixed with
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document.write( "5 gal of the expensive paint, the mixture will be worth
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document.write( "$19.825 per gallon. What is the price per gallon of each type of paint? \n" );
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Algebra.Com's Answer #527841 by josgarithmetic(39617)![]() ![]() ![]() You can put this solution on YOUR website! Simple linear system, two variables. \n" ); document.write( "x, price of cheap \n" ); document.write( "y, price of high priced\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "9x+7y=19.7 \n" ); document.write( "and \n" ); document.write( "3x+5y=19.825\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Solve whatever way you want. You could try multiplying the second equation by 3, and use this to eliminate x, and then solve for y... \n" ); document.write( " |