document.write( "Question 749934: I am 40 years old, and that means I am twice as old now as Kat was when I was as old as Kat is now. How old is kat. \n" ); document.write( "

Algebra.Com's Answer #456254 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+k+\"$ = Kat's age now in years
\n" ); document.write( "The difference in our ages is ( and always was )
\n" ); document.write( " $\"+40+-+k+\"$
\n" ); document.write( "When I was as old as Kat is now, I was $\"+k+\"$ years old
\n" ); document.write( "Kat is younger by the difference in our ages, so Kat was
\n" ); document.write( " $\"+k+-+%28+40+-+k+%29+=+2k+-+40+\"$
\n" ); document.write( "I am twice as old as that now, so I am
\n" ); document.write( " $\"+2%2A%28+2k+-+40+%29+\"$
\n" ); document.write( "I am $\"+40+\"$ now, so
\n" ); document.write( " $\"+2%2A%28+2k+-+40+%29+=+40+\"$
\n" ); document.write( " $\"+4k+-+80+=+40+\"$
\n" ); document.write( " $\"+4k+=+120+\"$
\n" ); document.write( " $\"+k+=+30+\"$
\n" ); document.write( "Kat is 30
\n" ); document.write( "-----------
\n" ); document.write( "check answer:
\n" ); document.write( "When I was as old as Kat is now, I was $\"+30+\"$
\n" ); document.write( "That was $\"+10+\"$ years ago, so Kat was $\"+20+\"$
\n" ); document.write( "Am I twice that age? Yes, I am $\"+40+\"$
\n" ); document.write( "OK \n" ); document.write( "

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