document.write( "Question 1011568: the difference between a girl and her younger sister is 4 years. the younger sister in turn is 4 years older than her brother.the sum of ages of the younger sister and brother is 16. how old are the three children? \n" ); document.write( "

Algebra.Com's Answer #627264 by josmiceli(19441) $\"\"$ $\"About$

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Let younger sister's age = $\"+x+\"$
\n" ); document.write( "Her older sister's age is $\"+x+%2B+4+\"$
\n" ); document.write( "The brother's age is $\"+x+-+4+\"$
\n" ); document.write( "The younger sister plus brother's age = $\"+16+\"$
\n" ); document.write( "----------------------------------------
\n" ); document.write( " $\"+x+%2B+x+-+4+=+16+\"$
\n" ); document.write( " $\"+2x+=+20+\"$
\n" ); document.write( " $\"+x+=+10+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+x+%2B+4+=+14+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+x+-+4+=+6+\"$
\n" ); document.write( "----------------
\n" ); document.write( "The younger sister is 10
\n" ); document.write( "Her older sister is 14
\n" ); document.write( "The brother is 6 \n" ); document.write( "

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