document.write( "Question 782185: Katie's father is three times her age. How old are Katie and her father now if, in 4 years time, the sum of their ages is 68? Use K to represent Katie's age. \n" ); document.write( "

Algebra.Com's Answer #476307 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+K+\"$ = Katie's age now
\n" ); document.write( " $\"+3K+\"$ = father's age now
\n" ); document.write( "In 4 years, $\"+K+%2B+4+\"$ = Katie's age
\n" ); document.write( "In 4 years, $\"+3K+%2B+4+\"$ = father's age
\n" ); document.write( "-----------------------------------------
\n" ); document.write( "given:
\n" ); document.write( " $\"+%28+K+%2B+4+%29+%2B+%28+3K+%2B+4+%29+=+68+\"$
\n" ); document.write( " $\"+4K+%2B+8+=+68+\"$
\n" ); document.write( " $\"+4K+=+60+\"$
\n" ); document.write( " $\"+K+=+15+\"$
\n" ); document.write( " $\"+3K+=+45+\"$
\n" ); document.write( "Katie is 15 and her father is 45
\n" ); document.write( "check:
\n" ); document.write( " $\"+%28+K+%2B+4+%29+%2B+%28+3K+%2B+4+%29+=+68+\"$
\n" ); document.write( " $\"+%28+15+%2B+4+%29+%2B+%28+45+%2B+4+%29+=+68+\"$
\n" ); document.write( " $\"+19+%2B+49+=+68+\"$
\n" ); document.write( " $\"+68+=+68+\"$
\n" ); document.write( "OK \n" ); document.write( "

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