document.write( "Question 604100: 5. In a zoo, the ratio of adults to children is 7 to 4. If there are 187 people in the zoo, how many children are there? \n" ); document.write( "

Algebra.Com's Answer #380951 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+a+\"$ = number of adults in the zoo
\n" ); document.write( " $\"+187+-+a+\"$ = number of children in the zoo
\n" ); document.write( "----------
\n" ); document.write( " $\"+7%2F4+=+a%2F%28+187-a+%29+\"$
\n" ); document.write( "Multiply both sides by $\"+4%2A%28+187+-+a+%29+\"$
\n" ); document.write( " $\"+7%2A%28+187+-+a+%29+=+4a+\"$
\n" ); document.write( " $\"+1309+-+7a+=+4a+\"$
\n" ); document.write( " $\"+11a+=+1309+\"$
\n" ); document.write( " $\"+a+=+119+\"$
\n" ); document.write( " $\"+187+-+a+=+187+-+119+\"$
\n" ); document.write( " $\"+187+-+a+=+68+\"$
\n" ); document.write( "There are 68 children in the zoo
\n" ); document.write( "check answer:
\n" ); document.write( " $\"+7%2F4+=+119%2F68+\"$
\n" ); document.write( " $\"+7%2A68+=+119%2A4+\"$
\n" ); document.write( " $\"+476+=+476+\"$
\n" ); document.write( "OK \n" ); document.write( "

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