W 6 3 7 July 8, 2019 16 32 64 128 6 w 3 )= 72 3 w 6 )- 7w 3 w 6 )- 7w simplified 7 6 w 3 )= 31 7 6 w 3 8 6 =- 2 3 w 7 7w 6 3 w 4 )+ 4w