document.write( "Question 1059670: Jerry is 6 years older than his friend George. Their other friend Kramer is 9 years younger then George. The sum of all their ages is 93 years. How old are the 3 friends?\r
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Algebra.Com's Answer #674693 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+a+\"$ = Jerry's age now
\n" ); document.write( "Let $\"+b+\"$ = George's age now
\n" ); document.write( "Let $\"+c+\"$ = Kramer's age now
\n" ); document.write( "-------------------------------
\n" ); document.write( "(1) $\"+a+=+b+%2B+6+\"$
\n" ); document.write( "(2) $\"+c+=+b+-+9+\"$
\n" ); document.write( "(3) $\"+a+%2B+b+%2B+c+=+93+\"$
\n" ); document.write( "-------------------------------
\n" ); document.write( "Substitute (1) and (2) into (3)
\n" ); document.write( "(3) $\"+b+%2B+6+%2B+b+%2B+b+-+9+=+93+\"$
\n" ); document.write( "(3) $\"+3b+=+93+-+6+%2B+9+\"$
\n" ); document.write( "(3) $\"+3b+=+96+\"$
\n" ); document.write( "(3) $\"+b+=+32+\"$
\n" ); document.write( "and
\n" ); document.write( "(1) $\"+a+=+32+%2B+6+\"$
\n" ); document.write( "(1) $\"+a+=+38+\"$
\n" ); document.write( "and
\n" ); document.write( "(2) $\"+c+=+32+-+9+\"$
\n" ); document.write( "(2) $\"+c+=+23+\"$
\n" ); document.write( "------------------------
\n" ); document.write( "Jerry is 38
\n" ); document.write( "George is 32
\n" ); document.write( "Kramer is 23
\n" ); document.write( "----------------
\n" ); document.write( "check:
\n" ); document.write( "(3) $\"+a+%2B+b+%2B+c+=+93+\"$
\n" ); document.write( "(3) $\"+38+%2B+32+%2B+23+=+93+\"$
\n" ); document.write( "(3) $\"+93+=+93+\"$
\n" ); document.write( "OK\r
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