5x 4x=12 6 July 8, 2019 16 32 64 128 5x 4x 12 6 5x 6 3 4x 12 4x 2 5x 12 6 5x 4x 28 6x 12 5x 6 2 3 4x 12 4x 6x 12 20 5x 5x 6 4x 3x 12 5x+4x=12 6