document.write( "Question 564234: How much of a 25% alloy and how much of a 50% alloy should be mixed to make 1000g of a 45% alloy
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document.write( "I have tried:
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document.write( ".25x+.5y=.45(1000)
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document.write( "x+y=1000
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document.write( "y=3000 and X=-2000
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document.write( "Answer doesn't make sense \n" );
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Algebra.Com's Answer #365286 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! your equations are fine\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "multiplying 1st eqn by -4 ___ -x - 2y = -1800\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "adding 2nd eqn to eliminate x ___ -x - 2y + x + y = -1800 + 1000 ___ -y = - 800\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "solve for y; then substitute back to find x \n" ); document.write( " |