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6x - 8 + 2x +4 = 36
8x - 4 = 36
8x = 40
x= 5
p = 3x - 4
= 3 . 5 - 4
=15 - 4
11
l = x+2
=5 + 2
= 7
Luas = p .l
= 11 . 7
77
semoga ngitungnya bener~