document.write( "Question 1002657: 16 years from now, Pia's age will be twice her age 12 years ago. What's her present age \n" ); document.write( "
Algebra.Com's Answer #619517 by josmiceli(19441)\"\" \"About 
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Let \"+x+\" = her present age
\n" ); document.write( "\"+x+%2B+16+\" = her age in 16 yrs
\n" ); document.write( "\"+x+-+12+\" = her age 12 years ago
\n" ); document.write( "-----------------------------
\n" ); document.write( "given:
\n" ); document.write( "\"+x+%2B+16+=+2%2A%28+x+-+12+%29+\"
\n" ); document.write( "\"+x+%2B+16+=+2x+-+24+\"
\n" ); document.write( "\"+x+=+16+%2B+24+\"
\n" ); document.write( "\"+x+=+40+\"
\n" ); document.write( "she is presently 40
\n" ); document.write( "----------------
\n" ); document.write( "check:
\n" ); document.write( "\"+x+%2B+16+=+2%2A%28+x+-+12+%29+\"
\n" ); document.write( "\"+40%2B+16+=+2%2A%28+40+-+12+%29+\"
\n" ); document.write( "\"+56+=+2%2A28+\"
\n" ); document.write( "\"+56+=+56+\"
\n" ); document.write( "OK
\n" ); document.write( "
\n" );