document.write( "Question 150905: The sum of the ages of Art, Ben, and Cal is 59. Art is 1 year older than Cal, Cal is 1 year younger than Ben. Which of these people were teenagers 7 years ago? \n" ); document.write( "
Algebra.Com's Answer #110844 by ankor@dixie-net.com(22740)\"\" \"About 
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Write an equation for each statement:
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\n" ); document.write( "\"The sum of the ages of Art, Ben, and Cal is 59.\"
\n" ); document.write( " a + b + c = 59
\n" ); document.write( ":
\n" ); document.write( "\"Art is 1 year older than Cal,\"
\n" ); document.write( "a = c + 1
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\n" ); document.write( "\"Cal is 1 year younger than Ben.\"
\n" ); document.write( "c = b - 1
\n" ); document.write( "or
\n" ); document.write( "b = c + 1
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\n" ); document.write( "Substitute for a and b and find in the total age equation, find c
\n" ); document.write( "(c+1) + (c+1) + c = 59
\n" ); document.write( "3c + 2 = 59
\n" ); document.write( "3c = 59 - 2
\n" ); document.write( "c = \"57%2F3\"
\n" ); document.write( "c = 19 yrs
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\n" ); document.write( "a = 20; b = 20
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\n" ); document.write( "Which of these people were teenagers 7 years ago?
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\n" ); document.write( "c would be 12, a & b would be teenagers \n" ); document.write( "
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