document.write( "Question 345470: Paula is 12 years older than her brother Bob. Four years from now Bob wil be two thirds as old as Paula. How old are they now? \n" ); document.write( "

Algebra.Com's Answer #247073 by Fombitz(32388) $\"\"$ $\"About$

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1. $\"P=B%2B12\"$
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\n" ); document.write( "In 4 years, Paula will be P+4, Bob will be B+4.
\n" ); document.write( " $\"B%2B4=%282%2F3%29%28P%2B4%29\"$
\n" ); document.write( "Multiply by 3.
\n" ); document.write( " $\"3%28B%2B4%29=2%28P%2B4%29\"$
\n" ); document.write( " $\"3B%2B12=2P%2B8\"$
\n" ); document.write( " $\"3B%2B4=2P\"$
\n" ); document.write( "Substitute from eq. 1,
\n" ); document.write( " $\"3B%2B4=2%28B%2B12%29\"$
\n" ); document.write( " $\"3B%2B4=2B%2B24\"$
\n" ); document.write( " $\"B=20\"$
\n" ); document.write( "Then,
\n" ); document.write( " $\"P=20%2B12\"$
\n" ); document.write( " $\"P=32\"$
\n" ); document.write( "Paula is 32, Bob is 20.
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