document.write( "Question 712031: please help me solve this age word problem: seven years ago, i was eleven times as old as my daughter. Now I am four times as old as she is. \n" ); document.write( "

Algebra.Com's Answer #437708 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+a+\"$ = your age now
\n" ); document.write( "Let $\"+b+\"$ = your Daughter's age now
\n" ); document.write( " $\"+a+-+7+\"$ = your age 7 years ago
\n" ); document.write( " $\"+b+-+7+\"$ = your Daughter's age 7 years ago
\n" ); document.write( "-------------
\n" ); document.write( "given:
\n" ); document.write( "(1) $\"+a+-+7+=+11%2A%28+b+-+7+%29+\"$
\n" ); document.write( "(2) $\"+a+=+4b+\"$
\n" ); document.write( "-------------
\n" ); document.write( "(1) $\"+a+-+7+=+11b+-+77+\"$
\n" ); document.write( "Substitute (2) into (1)
\n" ); document.write( "(1) $\"+4b+-+7+=+11b+-+77+\"$
\n" ); document.write( "(1) $\"+7b+=+77+-+7+\"$
\n" ); document.write( "(1) $\"+7b+=+70+\"$
\n" ); document.write( "(1) $\"+b+=+10+\"$
\n" ); document.write( "and, since
\n" ); document.write( "(2) $\"+a+=+4b+\"$
\n" ); document.write( "(2) $\"+a+=+4%2A10+\"$
\n" ); document.write( "(2) $\"+a+=+40+\"$
\n" ); document.write( "You are 40 and your Daughter is 10
\n" ); document.write( "check answer:
\n" ); document.write( "(1) $\"+a+-+7+=+11%2A%28+b+-+7+%29+\"$
\n" ); document.write( "(1) $\"+40+-+7+=+11%2A%28+10+-+7+%29+\"$
\n" ); document.write( "(1) $\"+33+=+11%2A3+\"$
\n" ); document.write( "(1) $\"+33+=+33+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

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