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l = x +1
a. K = 2 ( p + l)
K = 2 ( 3x-4 + x +1 )
K = 2 (4x-3)
K = 8x - 6
b. K = 8x-6
34 = 8x-6
40= 8x
5 = x
p = 3x - 4
p = 3(5) - 4 = 15-4 = 11
l = x + 1
l = 5 + 1 = 6
Luas = 11 * 6 = 66