Related Post: X 5 4 X 7 2 12 * 4 X 5 * 4 X 7 * 2 12 5 X 3 )- 4 X 7 )= 2x 3 5 X 4 )= 3 X 7 )+ 2 X 5 X 4 )= 2 2x 7 )+ 6 2x 5 )( X 4 )= X 2x 7 4x 5 )( X 7 )- 4x 2 10x 9 4 5 X 7 )= 20 X 3 5 X 4 7 6 2x 1 35 5 X 4 )= 7 2x 1