7x 10 x 5 3 2 July 8, 2019 16 32 64 128 3x 5 7x 10 2 x 3 10 7x − 5 5x − 3 2 x 4 6x 1 x2 7x 10 5 x 2 3 x 5 7 x 10 5 x 7 = 35 7x10 5 7 x 70