document.write( "Question 346221: maria is 3 years older than her brother, luis. luis is 2 years older than their younger sister, karla. the sum of their ages is 55. how old are the siblings? \n" ); document.write( "

Algebra.Com's Answer #247568 by Fombitz(32388) $\"\"$ $\"About$

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1. $\"M=3%2BL\"$
\n" ); document.write( "2. $\"L=K%2B2\"$
\n" ); document.write( "3. $\"M%2BL%2BK=55\"$
\n" ); document.write( "Substitute eq. 1 and eq. 2 into eq. 3,
\n" ); document.write( " $\"3%2BL%2BK%2B2%2BK=55\"$
\n" ); document.write( " $\"3%2BK%2B2%2BK%2B2%2BK=55\"$
\n" ); document.write( " $\"3K%2B7=55\"$
\n" ); document.write( " $\"3K=48\"$
\n" ); document.write( " $\"highlight%28+K=16%29\"$
\n" ); document.write( "Then from eq. 2,
\n" ); document.write( " $\"L=16%2B2\"$
\n" ); document.write( " $\"highlight%28+L=18%29\"$
\n" ); document.write( "Then from eq. 1,
\n" ); document.write( " $\"M=3%2B18\"$
\n" ); document.write( " $\"highlight%28+M=21%29\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( "Maria is 21, Luis is 18, and Karla is 16. \n" ); document.write( "

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