14 3 12 4 July 8, 2019 16 32 64 128 14 3 6b )-( 12 10 4b 4 a 14 12 3 b 14 stone 12 3/4 14 1 2 x 12 3 4 12 14 x 3 4 14 12 − 4x )= 3 − x
