document.write( "Question 518560: Anton is twice as old as Marie. Eight years ago, Anton was eight years younger than three times Marie's age. How old is Marie now? \n" ); document.write( "
Algebra.Com's Answer #345295 by Maths68(1474)\"\" \"About 
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Let
\n" ); document.write( "Present age of Anton = a
\n" ); document.write( "Present age of Marie = m\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Anton is twice as old as Marie.
\n" ); document.write( "a=2m.........(1)
\n" ); document.write( "Eight years ago,
\n" ); document.write( "Anton age = a-8
\n" ); document.write( "Marie age = m-8
\n" ); document.write( "Then, Anton was eight years younger than three times Marie's age.
\n" ); document.write( "a-8=3(m-8)-8
\n" ); document.write( "a-8=3m-24-8
\n" ); document.write( "a=3m-24-8+8
\n" ); document.write( "a=3m-24.........(2)
\n" ); document.write( "Put the value of a from (1) to (2)
\n" ); document.write( "2m=3m-24
\n" ); document.write( "2m-3m=-24
\n" ); document.write( "-m=-24
\n" ); document.write( "Multiply by -1 both sides
\n" ); document.write( "m=24\r
\n" ); document.write( "\n" ); document.write( "Put the value of m in (1)
\n" ); document.write( "a=2m
\n" ); document.write( "a=2*24
\n" ); document.write( "a=48\r
\n" ); document.write( "\n" ); document.write( "Present age of Anton = a = 48 years old
\n" ); document.write( "Present age of Marie = m = 24 years old
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