document.write( "Question 798465: Bob is one third the age of his father. In 12 years he will be half the age of his father. How old are each now? Must use x as a variable in the equation. There will be an x on both sides of the = sign. \n" ); document.write( "
Algebra.Com's Answer #482230 by mananth(16946)\"\" \"About 
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If Bob is x years father is 3x\r
\n" ); document.write( "\n" ); document.write( "12 years hence\r
\n" ); document.write( "\n" ); document.write( "bob = x+12
\n" ); document.write( "father = 3x+12\r
\n" ); document.write( "\n" ); document.write( "(x+12)=1/2(3x+12)\r
\n" ); document.write( "\n" ); document.write( "2(x+12)=3x+12\r
\n" ); document.write( "\n" ); document.write( "2x+24=3x+12\r
\n" ); document.write( "\n" ); document.write( "3x-2x=24-12
\n" ); document.write( "x=12 bob's age\r
\n" ); document.write( "\n" ); document.write( "father's age = 36
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