6x 2 −7x 2=7 July 8, 2019 16 32 64 128 6x 2 7x 2 7 6x 2 xy 7x 2y 2 7y 5 6x 2 7x 7 0 4x 2 7x 3 6x 2 5x 7 2x 7 2 6+7x=6 8
