-3x A 5x B
-4x A B -2x C -8x D
8x E 1x F 4x G
-7x A D C B -9x E F G -2x H
-1x I 2x J
-9x I J -8x K 5x L
1x A F D H E G C B 0x I L K J
Sol: J = -1; A = -5; I = -2; D = 5; E = -2; B = -3; K = 4; G = 3; C = -4; H = 2; L = 1; F = 4;