8x1= - 8, 8x2= - 16, 8x3= - 24, 8x4=  - 32, 8x5= - 40, 8x6= - 48, 8x7= - 56, 8x8= - 64, 8x9= - 72, 8x__= 8 - 1, 8x__= 16 - 2, 8x__= 24 - 3, 8x__= 32 - 4, 8x__= 40 - 5, 8x__= 48 - 6, 8x__= 56 - 7,

8's factor x factor and missing factor

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