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36 = 2 ( (3x+4) + (2x+4) )
36 = 2 (5x +8)
36 = 10 x + 16
36-16= 10x
20 = 10x
20/10 = x
2 = x
l = ( 2× + 4)
K = 36
K = 2p + 2l
= 2(3x + 4) + 2(2x + 4) = 36
= 6x + 8 + 4x + 8 = 36
= 10x + 16 = 36
10x = 36 - 16
10x = 20
x = 2