How to solve 40 x 4 (- 3 6x ) 6 July 8, 2019 16 32 64 128 How to solve 40 x 4 (- 3 6x )+ 6 4 + 4 = 6 How do you solve a 4 x 4 How to solve a 4 x 4 How to solve 4 x 4 cube