document.write( "Question 621321: The ratio of boys to all students is 2:5. If there are 120 girls, how many are boys. \n" ); document.write( "

Algebra.Com's Answer #390673 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"b\"$ = number of boys
\n" ); document.write( "Let $\"g\"$ = number of girls
\n" ); document.write( "given:
\n" ); document.write( " $\"+b%2Fg+=+2%2F5+\"$
\n" ); document.write( " $\"+g+=+120+\"$
\n" ); document.write( "-----------
\n" ); document.write( " $\"+5b+=+2g+\"$
\n" ); document.write( " $\"+b+=+%282g%29%2F5+\"$
\n" ); document.write( " $\"+b+=+%282%2A120%29%2F5+\"$
\n" ); document.write( " $\"+b+=+48+\"$
\n" ); document.write( "There are 48 boys
\n" ); document.write( "check:
\n" ); document.write( " $\"+b%2Fg+=+48%2F120+\"$
\n" ); document.write( " $\"+2%2F5+=+48%2F120+\"$
\n" ); document.write( " $\"+2%2A24+=+48+\"$
\n" ); document.write( " $\"+48+=+48+\"$
\n" ); document.write( "OK \n" ); document.write( "

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