document.write( "Question 578067: How much water should be added to 1 gallon of pure antifreese to obtain a solution that is 45% antifreeze? \n" ); document.write( "

Algebra.Com's Answer #370509 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+x+\"$ = gallons of water to be added
\n" ); document.write( " $\"+1+%2F+%28+1+%2B+x+%29+=+.45+\"$
\n" ); document.write( " $\"+1+=+.45%2A%28+1+%2B+x+%29+\"$
\n" ); document.write( " $\"+1+=+.45+%2B+.45x+\"$
\n" ); document.write( " $\"+.45x+=+.55+\"$
\n" ); document.write( " $\"+.09x+=+.11+\"$
\n" ); document.write( " $\"+x+=+.11%2F.09+\"$
\n" ); document.write( " $\"+x+=+1.222+\"$
\n" ); document.write( "1.222 gallons of water must be added
\n" ); document.write( "check:
\n" ); document.write( " $\"+1+%2F+%28+1+%2B+x+%29+=+.45+\"$
\n" ); document.write( " $\"+1+%2F+%28+1+%2B+1.222+%29+=+.45+\"$
\n" ); document.write( " $\"+1+%2F+2.222+=+.45+\"$
\n" ); document.write( " $\"+1+=+.45%2A2.222+\"$
\n" ); document.write( " $\"+1+=+.9999+\"$
\n" ); document.write( "OK - error due to rounding off \n" ); document.write( "

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