document.write( "Question 196218: Hello.\r
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document.write( "I'm having some difficulty figuring out the following word problem, Can you help me?\r
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document.write( "A jeweler has 6 rings, each weighing 7 g, made of an alloy of 5% silver and 95% gold. He decides to melt down the rings and add enough silver to reduce the gold content to 87%. How much silver should he add?\r
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document.write( "Thanks! \n" );
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Algebra.Com's Answer #147102 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! the jeweler has 42g of alloy (6 times 7)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "if the new alloy is 87% gold, then it is also 13% silver (87+13=100)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "let x=\"amount of added silver\"\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the original amount of silver plus the added silver equals the new amount \n" ); document.write( "___ (5%)(42) + x = (13%)(42+x)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "2.1 + x = 5.46 + .13x\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( ".87x = 3.36\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x = 3.86 (approx) \n" ); document.write( " |