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L= x - 3
K= <98
dit : nilai x ?
jwb : K = 2P + 2L
<98 = 2 (2x + 1) + 2 (x -3)
<98 = 4x + 2 + 2x - 6
<98 = 6x - 4
<98 + 4 = 6x
<102 = 6x
<102/6 = x
< 17 = x
maka x < 17