document.write( "Question 1157378: charlie is 4 more than twice as old as frank. Frank is 3 years younger than bob. If bob is 9 years old, how old is charlie \n" ); document.write( "

Algebra.Com's Answer #780217 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+x+\"$ = Frank's age
\n" ); document.write( " $\"+2x+%2B+4+\"$ = Charlie's age
\n" ); document.write( " $\"+x+%2B+3+\"$ = Bob's age
\n" ); document.write( " $\"+9+\"$ = Bob's age
\n" ); document.write( "----------------------------------
\n" ); document.write( " $\"+x+%2B+3+=+9+\"$
\n" ); document.write( " $\"+x+=+6+\"$
\n" ); document.write( " $\"+2x+%2B+4+=+2%2A6+%2B+4+\"$
\n" ); document.write( " $\"+2x+%2B+4+=+12+%2B+4+\"$
\n" ); document.write( " $\"+2x+%2B+4+=+16+\"$
\n" ); document.write( "Charlie is 16
\n" ); document.write( " \n" ); document.write( "

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