3 2 3 x 5 2 15 1 July 8, 2019 16 32 64 128 2 3 x 5 2 3 x 19 15 3 x 5 5 3 5 4 2 3 x 2 1 15 1 2 3 x 2 )/ 5 3x 1 )/ 15 3 x-5=x+3
