8/12 = x/8+x
8(8+x) = 12x
64 + 8x = 12x
64 = 12 x - 8x
4x = 64
x = 16 cm
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8/12 = x/8+x
8(8+x) = 12x
64 + 8x = 12x
64 = 12 x - 8x
4x = 64
x = 16 cm