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64 = 2(2x + 3 + x + 8)
64 = 4x + 6 + 2x + 16
64 -22 = 6x
42 = 6x
x = 7
lebar = x + 8 = 7 + 8 = 15cm
[cmiiw]
=4x+6+2x+16
=6x+22=64
6x=64-22
x=42/6
x=7
jadi>>
p=(2.7+3)=17
l=(7+8)=15