document.write( "Question 185280: Zelma is eighteen years older than her son. She was three times as old as he was one year ago. How old are they now? \n" ); document.write( "

Algebra.Com's Answer #138975 by josmiceli(19441) $\"\"$ $\"About$

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Z's age now = $\"z\"$
\n" ); document.write( "Son's age now = $\"s\"$
\n" ); document.write( "given:
\n" ); document.write( "(1) $\"z+=+s+%2B+18\"$
\n" ); document.write( "(2) $\"z+-+1+=+3%2A%28s+-+1%29\"$
\n" ); document.write( "Substitute (1) in (2)
\n" ); document.write( "(2) $\"s+%2B+18+-+1+=+3%2A%28s+-+1%29\"$
\n" ); document.write( "(2) $\"s+%2B+17+=+3s+-+3\"$
\n" ); document.write( "(2) $\"2s++=+20\"$
\n" ); document.write( "(2) $\"s+=+10\"$
\n" ); document.write( "and
\n" ); document.write( "(1) $\"z+=+10+%2B+18\"$
\n" ); document.write( "(1) $\"z+=+28\"$
\n" ); document.write( "She is 28 and her Son is 10 \n" ); document.write( "

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