8 2 5x 4 7x July 8, 2019 16 32 64 128 7x 3x 8 2 5x 4 3 8 5x 2 2x 7x 4 5x 8 4x 2 7x 4 2x 2 5x 4 x 2 7x 8 8 รท 5/8 5x-2x=8 7
