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2(2x+3+x+8) =64
2 (3x +11) = 64
6x +22 =64
6x = 64-22
6x = 42
x = 7
lebar = x+8
= 8 + 7
= 15 cm
jawabaN B
64cm = 2 ( 2x + 3 + x + 8)
64cm = 2 (3x + 11)
64 cm = 6x + 22
64 - 22 = 6x
42 = 6x
7 = x
x= 7
lebar = x + 8
= 7 + 8
=15 cm