document.write( "Question 76006This question is from textbook Algebra 1
\n" ); document.write( ": Frederique is 2 years older than her brother. 12 years ago she was twice as old as he was. How old are they now? \n" ); document.write( "
Algebra.Com's Answer #54600 by ankor@dixie-net.com(22740)\"\" \"About 
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Let f = fred's age now. b = brother's age now
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\n" ); document.write( "Write an equation for each sentence:
\n" ); document.write( "\"Frederique is 2 years older than her brother.\"
\n" ); document.write( "f = (b + 2)
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\n" ); document.write( "b = (f - 2)
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\n" ); document.write( "\" 12 years ago she was twice as old as he was.\"
\n" ); document.write( "(f - 12) = 2(b - 12)
\n" ); document.write( " f - 12 = 2b - 24
\n" ); document.write( "f = 2b - 24 + 12
\n" ); document.write( "f = 2b - 12
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\n" ); document.write( "Substitute (f-2) for b:
\n" ); document.write( "f = 2(f - 2) - 12
\n" ); document.write( "f = 2f - 4 - 12
\n" ); document.write( "f - 2f = -16
\n" ); document.write( "-f = -16
\n" ); document.write( "f = 16 yrs age now, then b = 16 - 2 = 14 yrs age now
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\n" ); document.write( "Check 12 years ago
\n" ); document.write( "(16-12) = 2(14-12)
\n" ); document.write( "4 = 2(2)\r
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