Question 1020094
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Hi  
Let x, y , z represent Peter, Paul and Mary's age
Question States***(Write as You Read)
I. x + y = 39   
II.<u>x + z = 44</u>  Subtracting 1st from second
     z-y = 5
III. y+z = 47  0r
z-y = 5
<u>z + y = 47</u>   
 2z = 52
  z = 26, x = 18 {{{x+26=44}}}  and y = 21 {{{ y + 26 = 47}}}