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=2(3x+2) + 2(2x-3)
=6x + 4 + 4x -6
=10x -2
kell = 36 cm
36 = 10x-2
36+2 = 10x
38 = 10x
3,8 = x
panjang=3x+2 = 3(3,8) + 2 = 11,4 + 2 = 13,4 cm
lebar = 2x-3 = 2(3,8) - 3 = 7,6 - 3 = 4,6 cm
**maaf kalau salah