6x H 4x M -5x T
2x R 3x C -9x E
2x A 4x G -2x O
4x H T M -1x R E C -6x A G O
Sol: A = 1; C = 3; E = 5; G = 7; H = 8; M = 13; O = 15; R = 18; T = 20