document.write( "Question 991678: A girl is three years older than her brother. If their combined age is 35 years, how old is each? \n" ); document.write( "

Algebra.Com's Answer #611504 by MathLover1(20850) $\"\"$ $\"About$

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\n" ); document.write( "let's girl's age be $\"g\"$ and boy's age $\"b\"$
\n" ); document.write( "if a girl is $\"3\"$ years older than her brother, then we know that\r
\n" ); document.write( "\n" ); document.write( " $\"g=b%2B3\"$ .......eq.1\r
\n" ); document.write( "\n" ); document.write( "if their combined age is $\"35\"$ years, we know that \r
\n" ); document.write( "\n" ); document.write( " $\"g%2Bb=35\"$ ........eq.2...substitute $\"b%2B3\"$ for $\"g\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"b%2B3%2Bb=35\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"2b=35-3\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"2b=32\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"b=32%2F2\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"b=16\"$ => boy's age\r
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\n" ); document.write( "\n" ); document.write( " $\"g=b%2B3\"$ => $\"g=16%2B3\"$ => $\"g=19\"$ =>girl's age\r
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