document.write( "Question 175034: a father is three time as old as his son in 13 years time. the father will only be twice as old as his son. find their present ages ? \n" ); document.write( "
Algebra.Com's Answer #130136 by ptaylor(2198)\"\" \"About 
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Let x=son's present age; x+13=son's age in 13 years
\n" ); document.write( "Then 3x=father's present age; 3x+13=father's age in 13 years\r
\n" ); document.write( "\n" ); document.write( "Now we are told the following:
\n" ); document.write( "3x+13=2(x+13) get rid of parens
\n" ); document.write( "3x+13=2x+26 subtract 13 and also 2x from each side
\n" ); document.write( "3x-2x+13-13=2x-2x+26-13 collect like terms
\n" ); document.write( "x=13----------------------------son's present age
\n" ); document.write( "3x=3*13=39-------------------------father's present age\r
\n" ); document.write( "\n" ); document.write( "39+13=2*(13+13)
\n" ); document.write( "52=2*26
\n" ); document.write( "52=52\r
\n" ); document.write( "\n" ); document.write( "Doess this help?----ptaylor
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