X 3 2 5 7 15 July 8, 2019 16 32 64 128 4 3 x 5 2 x 7 15 X 3 x 5 80 x 2 25 15 7 1 5 x 2 3 )= 7 15 2x 1 5 x 2 3 x 7 15 2 3 x 4 )= 5 5 6x 7 15 3 x-5=x+3 5 x 7 = 35
