document.write( "Question 170152: how many punds of an alloy containing 60% silver must be added to 50 pounds of an alloy containing 45% silver to obtain an alloy containing 51% silver? \n" ); document.write( "

Algebra.Com's Answer #125611 by Mathtut(3670) $\"\"$ $\"About$

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lets call the pounds needed for 60% alloy x.
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\n" ); document.write( ".6x+.45(50)=.51(x+50)
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\n" ); document.write( ".6x+22.5=25.5+.51x
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\n" ); document.write( ".09x=3
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\n" ); document.write( " $\"highlight%28x=33.33%29\"$ pounds needed for 60% alloy \n" ); document.write( "

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