Question 860693
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Hi,
x^2 + (2x+ 4)^2 = (2x+6)^2
x^2 + 4x^2 + 16x + 16 = 4x^2 + 24x + 36
  x^2 -8x- 20 = 0     factor
 (x+2)(x-10) = 0    (Tossing out the negative solution for unit measure)
       x = 10 paces