7x 9 4x 27 July 8, 2019 16 32 64 128 9 7x 3 4x 27 7x 4 (- 4x 9 )=- 27 9 4 7x 6 )= 4x 27 Como resolver 9 7x 3 4x 27 2x 7 7x4 9