document.write( "Question 769653: The difference between the age of Sarah and Anna is 15 .What is the sum of their age if Sarah's age is twice Anna's age. Answer in Algebra Form \n" ); document.write( "
Algebra.Com's Answer #471053 by tommyt3rd(5050)\"\" \"About 
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S-A=15
\n" ); document.write( "and
\n" ); document.write( "S=2A\r
\n" ); document.write( "\n" ); document.write( "so 2A-A=15, A=15\r
\n" ); document.write( "\n" ); document.write( "therefore S=30
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