document.write( "Question 1104122: A woman is now 30 years older than her son. 15 years ago,she was twice as old. What are the present ages of the woman and her son \n" ); document.write( "

Algebra.Com's Answer #718849 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+a+\"$ = present age of the woman
\n" ); document.write( "Let $\"+b+\"$ = present age of her son
\n" ); document.write( "-----------------------------------
\n" ); document.write( "(1) $\"+a+=+b+%2B+30+\"$
\n" ); document.write( "(2) $\"+a+-+15+=+2%2A%28+b+-+15+%29+\"$
\n" ); document.write( "-----------------------------
\n" ); document.write( "(2) $\"+a+-+15+=+2b+-+30+\"$
\n" ); document.write( "(2) $\"+-a+%2B+2b+=+15+\"$
\n" ); document.write( "and
\n" ); document.write( "(1) $\"+a+-+b+=+30+\"$
\n" ); document.write( "Add (1) and (2)
\n" ); document.write( " $\"+b+=+45+\"$
\n" ); document.write( "and
\n" ); document.write( "(1) $\"+a+=+b+%2B+30+\"$
\n" ); document.write( "(1) $\"+a+=+45+%2B+30+\"$
\n" ); document.write( "(1) $\"+a+=+75+\"$
\n" ); document.write( "---------------------
\n" ); document.write( "The woman is 75
\n" ); document.write( "Her son is 45
\n" ); document.write( "---------------------
\n" ); document.write( "check:
\n" ); document.write( "(2) $\"+a+-+15+=+2%2A%28+b+-+15+%29+\"$
\n" ); document.write( "(2) $\"+75+-+15+=+2%2A%28+45+-+15+%29+\"$
\n" ); document.write( "(2) $\"+60+=+2%2A30+\"$
\n" ); document.write( "(2) $\"+60+=+60+\"$
\n" ); document.write( "OK \n" ); document.write( "

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