document.write( "Question 632472: A car has a 15 quart capacity. There are 12 quarts with 30% antifreeze solution. How many quarts of pure antifreeze will you need to strengthen the solution to 40%?\r
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Algebra.Com's Answer #398299 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+x+\"$ = quarts of pure antifreeze needed
\n" ); document.write( " $\"+.3%2A12+=+3.6+\"$ quarts of pure antifreeze in 30% solution
\n" ); document.write( "-------------
\n" ); document.write( " $\"+%28+x+%2B+3.6+%29+%2F+%28+x+%2B+12+%29+=+.4+\"$
\n" ); document.write( " $\"+x+%2B+3.6+=+.4%2A%28+x+%2B+12+%29+\"$
\n" ); document.write( " $\"+x+%2B+3.6+=+.4x+%2B+4.8+\"$
\n" ); document.write( " $\"+.6x+=+1.2+\"$
\n" ); document.write( " $\"+x+=+2+\"$
\n" ); document.write( "2 quarts of pure antifreeze are needed
\n" ); document.write( "check:
\n" ); document.write( " $\"+%28+2+%2B+3.6+%29+%2F+%28+2+%2B+12+%29+=+.4+\"$
\n" ); document.write( " $\"+5.6%2F14+=+.4+\"$
\n" ); document.write( " $\"+5.6+=+.4%2A14+\"$
\n" ); document.write( " $\"+5.6+=+5.6+\"$
\n" ); document.write( "OK
\n" ); document.write( "and since $\"+12+%2B+2+\"$ is les than $\"15\"$ , the capacity
\n" ); document.write( "is not exceeded \n" ); document.write( "

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