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36=2(3x-4+x+2)
36=6x-8+2x+4
36=4x+12
4x=36+12
x= 48/4
x=12
l= x+2
= 12+2
=4
kel = 2(3x-4)+2(x+2)
36=6x-8+2x+4
8x=36-8+4
8x=32
x=32:8
x=4
lebar = x+2
lebar = 4+2 = 6