document.write( "Question 712051: Greg is 13 years older than his brother. in nine years, Greg will be twice as old as his brother. How old are they now \n" ); document.write( "
Algebra.Com's Answer #437721 by Menjax(62)\"\" \"About 
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Let G = Greg's age
\n" ); document.write( "Let B = Brother's age\r
\n" ); document.write( "\n" ); document.write( "G = B + 13
\n" ); document.write( "(The brother is thirteen years younger than Greg, so If you add thirteen years to the brother's age, Greg and his bro are the same age.)\r
\n" ); document.write( "\n" ); document.write( "(In 9 years (Greg get's 9 years older) Greg will be twice his brother's age)
\n" ); document.write( "G + 9 = 2B
\n" ); document.write( "Using simultaneous equations (substitution method)
\n" ); document.write( "(B + 13) + 9 = 2B
\n" ); document.write( "B + 22 = 2B
\n" ); document.write( "22 = B
\n" ); document.write( "Sub that into equation 1
\n" ); document.write( "G = 22 + 13
\n" ); document.write( "G = 35\r
\n" ); document.write( "\n" ); document.write( "So B=22 and G=35\r
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