Question 873290
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Hi,
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P = 2L + 2w
 {{{ 2(4+x) + 2(5+x) = 5(2*8 + 2*5)}}}
     8 + 2x + 10 + 2x = 130
                 4x = 112
                  x = 28 need to add to both the original L and w
CHECKING our answer***
  2(4+28) + 2(5+28) = 64 + 66 = 130
Wish You the Best in your Studies.