document.write( "Question 186369: Fred is 12 years older than his brother.
\n" ); document.write( " In 2 years Fred will be twice as old as his brother will be.
\n" ); document.write( " How old is each of them now? \n" ); document.write( "
Algebra.Com's Answer #139727 by ankor@dixie-net.com(22740)\"\" \"About 
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Let f = Fred's age now
\n" ); document.write( "Let b = brother's age now
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\n" ); document.write( "Write an equation for each statement:
\n" ); document.write( ":
\n" ); document.write( "\"Fred is 12 years older than his brother.\"
\n" ); document.write( "f = b + 12
\n" ); document.write( ":
\n" ); document.write( "\"In 2 years Fred will be twice as old as his brother will be.\"
\n" ); document.write( "f + 2 = 2(b+2)
\n" ); document.write( "f + 2 = 2b + 4
\n" ); document.write( "f = 2b + 4 - 2
\n" ); document.write( "f = 2b + 2\r
\n" ); document.write( "\n" ); document.write( " How old is each of them now?
\n" ); document.write( ":
\n" ); document.write( "Substitute (b+12) for f in the above equation:
\n" ); document.write( "b+12 = 2b + 2
\n" ); document.write( "b -2b = 2 - 12
\n" ); document.write( "-b = -10
\n" ); document.write( "b = 10 yrs is brothers age
\n" ); document.write( "then
\n" ); document.write( "12 + 10 = 22 yrs is Fred's age
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\n" ); document.write( ":
\n" ); document.write( "Check solution in statement:
\n" ); document.write( "\"In 2 years Fred will be twice as old as his brother will be.
\n" ); document.write( "22 + 2 = 2(10 +2)
\n" ); document.write( " \n" ); document.write( "
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