13 5 x 7 July 8, 2019 16 32 64 128 13 5 x 7 2 5 = - 4/7 x + 13 13 5 x 7 6 13 5 x 75 13 5 x 7 9 13 5 x 70 13 5 x 10 7 13 5 x 1 7 13 2 5 7 x 3 9 13 2 x 5 7 6 5 (- x 7 )+ 3x =- 13 7 13 x 5 26 13 1 x 5 8 1 7 5 x 13 2 )= 72 2 5 13 x 78
