document.write( "Question 411182: the ratio of children to adult is 7:3, and there are 820 people. how many are children?\r
\n" ); document.write( "\n" ); document.write( "please explain...and thank you!!
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Algebra.Com's Answer #289025 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
I can say:
\n" ); document.write( "(children)/(adults) = 7/3
\n" ); document.write( "I can also say:
\n" ); document.write( "(children)/(children + adults) = 7/(7 +3)
\n" ); document.write( "and
\n" ); document.write( "(adults)/(children + adults) = 3/(7 + 3)
\n" ); document.write( "-------------------
\n" ); document.write( "I'm told that children + adults = 820
\n" ); document.write( "therefore
\n" ); document.write( "\"c+%2F+820+=+7%2F10\"
\n" ); document.write( "and
\n" ); document.write( "\"a+%2F+820+=+3%2F10\"
\n" ); document.write( "---------------
\n" ); document.write( "\"c+=+%287%2F10%29%2A820\"
\n" ); document.write( "\"c=+574\"
\n" ); document.write( "and
\n" ); document.write( "\"a+=+%283%2F10%29%2A820\"
\n" ); document.write( "\"a+=+246\"
\n" ); document.write( "There are 574 children
\n" ); document.write( "check answer:
\n" ); document.write( "\"a+%2B+c+=+246+%2B+574\"
\n" ); document.write( "\"a+%2B+c+=+820\"
\n" ); document.write( "OK
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