document.write( "Question 938059: Marianne is 4 years older than Anna and 2 years older than Khate. 4 years ago, thrice Marianne's age devided by Anna's age was # years less than Khate's age. Find their present ages? \n" ); document.write( "
Algebra.Com's Answer #571549 by ankor@dixie-net.com(22740)\"\" \"About 
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m = Maria's present age
\n" ); document.write( "a = Ann's present age
\n" ); document.write( "k = Kate's present age
\n" ); document.write( ":
\n" ); document.write( "Write an equation for each statement
\n" ); document.write( ":
\n" ); document.write( "Marianne is 4 years older than Anna and 2 years older than Khate.
\n" ); document.write( "m = a + 4
\n" ); document.write( "or
\n" ); document.write( "a = (m-4)
\n" ); document.write( ":
\n" ); document.write( "m = k + 2
\n" ); document.write( "or
\n" ); document.write( "k = (m-2)
\n" ); document.write( ";
\n" ); document.write( " 4 years ago, thrice Marianne's age divided by Anna's age was 3 years less than Khate's age.
\n" ); document.write( "\"%283%28m-4%29%29%2F%28a-4%29\" = (k-4) - 3
\n" ); document.write( "\"%28%283m-12%29%29%2F%28a-4%29\" = k - 7
\n" ); document.write( "replace a with (m-4) and k with (m-2)
\n" ); document.write( "\"%28%283m-12%29%29%2F%28%28m-4%29-4%29\" = (m-2) - 7
\n" ); document.write( "\"%28%283m-12%29%29%2F%28%28m-8%29%29\" = m - 9
\n" ); document.write( "3m - 12 = (m-8)(m-9)
\n" ); document.write( "3m - 12 = m^2 - 17m + 72
\n" ); document.write( "Combine like terms on the right
\n" ); document.write( "0 = m^2 - 17m - 3m + 72 + 12
\n" ); document.write( "A quadratic equation
\n" ); document.write( "m^2 - 20m + 84 = 0
\n" ); document.write( "Factors to
\n" ); document.write( "(m-6)(m-14) = 0
\n" ); document.write( "Two solutions
\n" ); document.write( "m = 6, not a reasonable answer
\n" ); document.write( "m = 14 yrs is Maria's age
\n" ); document.write( "then
\n" ); document.write( "a = 14 - 4 = 10 yrs is Ann's age
\n" ); document.write( "and
\n" ); document.write( "k = 14 - 2 = 12 yrs is Kate's age\r
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