document.write( "Question 201941: “I am four times as old as you were when I was the same age as you are now. I am forty years old, how old are you?” \n" ); document.write( "
Algebra.Com's Answer #152177 by ptaylor(2198)\"\" \"About 
You can put this solution on YOUR website!
Let x=your present age
\n" ); document.write( "And 40=my present age
\n" ); document.write( "Some \"y\" years ago I was the same age as you are now, so:
\n" ); document.write( "40-y=x
\n" ); document.write( "-y=x-40
\n" ); document.write( "y=40-x
\n" ); document.write( "So 40-x years ago I was the same age as you are now
\n" ); document.write( "And 40-x years ago, you were x-(40-x)=2x-40 years old.
\n" ); document.write( "So, our equation to solve is:
\n" ); document.write( "40=4*(2x-40)
\n" ); document.write( "40=8x-160
\n" ); document.write( "8x=200
\n" ); document.write( "x=25----------------your present age\r
\n" ); document.write( "\n" ); document.write( "CK\r
\n" ); document.write( "\n" ); document.write( "15 years ago, I was the same age as your are now (40-15=25)
\n" ); document.write( "15 years ago, you were 25-15=10
\n" ); document.write( "40=4*10\r
\n" ); document.write( "\n" ); document.write( "Hope this helps---ptaylor
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