document.write( "Question 1045066: How many quarts of pure antifreeze must be added to 2 quarts of a 10% antifreeze solution to obtain a 20% antifreeze solution? \n" ); document.write( "

Algebra.Com's Answer #660463 by josgarithmetic(39618) $\"\"$ $\"About$

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Using arithmetic with a variable,
\n" ); document.write( "let v be how much of the pure 100% antifreeze to add.
\n" ); document.write( " $\"%282%2A10%2B100%2Av%29%2F%28v%2B2%29=20\"$
\n" ); document.write( "Be sure this equation makes sense. When it does, then a large part of the problem has been handled. Solve for v.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"%282%2Bv%2A10%29%2F%28v%2B2%29=2\"$
\n" ); document.write( " $\"10v%2B2=2%28v%2B2%29\"$
\n" ); document.write( " $\"10v%2B2=2v%2B4\"$
\n" ); document.write( " $\"8v=2\"$
\n" ); document.write( " $\"highlight%28v=1%2F4%29\"$ , which as quarts, would be 1 cup or 8 fluid ounces. \n" ); document.write( "

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