document.write( "Question 1151842: In a metal alloy, the ratio of zinc to copper is 3 to 14. If there are 560 lb of copper, how much zinc is there? \n" ); document.write( "

Algebra.Com's Answer #773692 by ikleyn(52794) $\"\"$ $\"About$

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document.write( "According to the condition, the masses of zinc and copper in the alloy are 3x and 14x, where x is the common measure of masses.\r\n" );
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document.write( "The value of x is unknown now, but we can easily find it from the other condition of the problem\r\n" );
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document.write( "    14x = 560,\r\n" );
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document.write( "which gives  x = 560/14 = 40.\r\n" );
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document.write( "Thus the mass of zinc in the alloy is 3*40 = 120 lb.    ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "Another way to setup the governing equation is THIS :\r
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document.write( "Write the proportion\r\n" );
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document.write( "     = ,\r\n" );
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document.write( "based on the condition.\r\n" );
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document.write( "From the proportion, the mass of zinc in the alloy is\r\n" );
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document.write( "    Z =  = 40*3 = 120 lb.      the same ANSWER\r\n" );
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