document.write( "Question 540697: Johnny left his office and took the elvator down 4 floors to the cafeteria. He then went up 21 floors to the meeting on the 28th floor. Where is Johnny's office located ? \n" ); document.write( "

Algebra.Com's Answer #353823 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"f\"$ = Johnny's floor
\n" ); document.write( "given:
\n" ); document.write( " $\"+f+-+4+\"$ = cafeteria
\n" ); document.write( " $\"+f+-+4+%2B+21+\"$ = meeting at 28th floor
\n" ); document.write( " $\"+f+%2B+17++=+28+\"$
\n" ); document.write( " $\"+f+=+11+\"$
\n" ); document.write( "He is on the 11th floor \n" ); document.write( "

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