document.write( "Question 614386: A certain metal has 40% tin. How many kilograms of this metal is to be mixed with 80 kilogram of metals with 70% tin in order to have a metal of 50% tin? \n" ); document.write( "
Algebra.Com's Answer #386551 by scott8148(6628)\"\" \"About 
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(40%)x + (70%)80 = (50%)(80 + x) \n" ); document.write( "
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