document.write( "Question 704406: The ration of boys to girls in history or 4 to 5 , how ,any girls are in the class of there's 12 boys ? \n" ); document.write( "

Algebra.Com's Answer #434069 by Stitch(470) $\"\"$ $\"About$

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You are given two ratios.
\n" ); document.write( " $\"4%2F5+=+12%2FX\"$
\n" ); document.write( "Cross multiply
\n" ); document.write( " $\"4X+=+5%2A12\"$
\n" ); document.write( "Simplify
\n" ); document.write( " $\"4X+=+60\"$
\n" ); document.write( "Divide both sides by 4
\n" ); document.write( " $\"highlight%28X+=+15%29\"$
\n" ); document.write( "There are 15 girls in the class \n" ); document.write( "

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