U7.D4 Balancing Equations

(Use a '1' for anything you don't change) 3 1 3 2 2 7 6 4 3 1 1 3 1 2 2 1 4 3 4 6 2 1 1 2 1 6 2 6 2 3 1 6 4 3 1 12 1 1 1 3