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panjang = 2l - 4
lebar = x
K < 34
maka :
K > 2 x (p+l)
34 > 2 x (2x - 4 + x )
34 > 2 x (3x -4)
34 > 6x - 8
6x > 34 + 8
6x > 42
x > 42/6
x > 7