document.write( "Question 106246: john is x years old. his father is 3 times as old as he is. his mother is 3 years younger than his father. find the sum of their ages in terms of x in 10 years time. \n" ); document.write( "
Algebra.Com's Answer #77291 by ptaylor(2198)\"\" \"About 
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NOW:
\n" ); document.write( "x=John's age
\n" ); document.write( "3x=father's age
\n" ); document.write( "3x-3=mother's age\r
\n" ); document.write( "\n" ); document.write( "TEN YEARS FROM NOW:
\n" ); document.write( "x+10=John's age
\n" ); document.write( "3x+10=father's age
\n" ); document.write( "(3x-3)+10=mother's age\r
\n" ); document.write( "\n" ); document.write( "SO THE SUM OF THEIR AGES IN TEN YEARS TIME IS:\r
\n" ); document.write( "\n" ); document.write( "x+10+3x+10+(3x-3)+10 get rid of parens\r
\n" ); document.write( "\n" ); document.write( "x+10+3x+10+3x-3+10 collect like terms\r
\n" ); document.write( "\n" ); document.write( "7x+27---------------ans\r
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\n" ); document.write( "\n" ); document.write( "Hope this helps---ptaylor\r
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