3x 21 3 x 7 July 8, 2019 16 32 64 128 21 x 3 )+ 20 7 3x 2 X 3 7x 2 3x 21 X 3 7x 2 3x 21 0 Identify the number of solutions to 3x 21 3 x 7 21x 3
