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| x+8=12 | | x+8=11 | | x+8=10 | | x+7=20 | | x+7=19 | | x+7=18 | | x+7=17 | | x+7=16 | | x+7=15 | | x+7=14 | | x+7=13 | | x+7=12 | | x+7=11 | | x+7=10 |