7x 5 6x 8 July 8, 2019 16 32 64 128 5 6x 1 7x )* 42 82 Y 7x 5 y x 2 6x 8 7x 2 6x 5 )(- 8x 3 7x 3 8 6x 5 8 8 2 7x 5 )= 6x 4 6x 7y 5 7x 8y 6 9x 8 7x 6x 5 4x