document.write( "Question 161533: A store owner has 12 pounds of pasta worth 70 cents a pound. She wants to mix it with pasta worth 45 cents a pound so that the total mixture can be sold for 55 cents a pound ( without any gain or loss). How much of the 45 cent pasta must she use? \n" ); document.write( "
Algebra.Com's Answer #118999 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
.70*12+.45x=.55(12+x)
\n" ); document.write( "8.4+.45x=6.6+.55x
\n" ); document.write( ".45x-.55x=6.6-8.4
\n" ); document.write( ".1x=1.8
\n" ); document.write( "x=1.8/.1
\n" ); document.write( "x=18 pounds of the $.45 pasta is needed.
\n" ); document.write( "Proof:
\n" ); document.write( ".70*12+.45*18=.55(12+18)
\n" ); document.write( "8.4+8.1=.55*30
\n" ); document.write( "16.5=16.5
\n" ); document.write( "
\n" );