5m Zen
1 8x 3y 3
1 8x 3y 3 pictures 5
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1 8x 3y 3
8x 3y 6 1 3
3 8x 3y 3 1 4xy
3 4x 2 3y 3 8x 1 2y
8x 1 3y 0 12x 3 y substitution
3 8x 1 3y 17 24
1 8x 3y 3
