5 1 13 x 7 July 8, 2019 16 32 64 128 13 1 x 5 8 1 7 5 8 x 1 13 15 x 2 2 7 1 5 9 13 x 780 solve the equation If 1 5 9 13 x 780 11 1 13 x 7 5 12 5 1 7 x 2.8 13 5 x 1 )- 2 x 7 )= 13 5 x 1 )- 7x - 13 6 x 1 )+ 5 13 − 2 7x 5 x 2 )- 4 13 7 x 1
