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| 20x+1=12 | | 20x+1=11 | | 20x+1=10 | | 20x+1=9 | | 20x+1=8 | | 20x+1=7 | | 20x+1=6 | | 20x+1=5 | | 20x+1=4 | | 20x+1=3 | | 20x+1=2 | | 20x+1=1 | | 19x+20=20 | | 19x+20=19 | | 19x+20=18 | | 19x+20=17 | | 19x+20=16 | | 19x+20=15 | | 19x+20=14 | | 19x+20=13 | | 19x+20=12 | | 19x+20=11 | | 19x+20=10 | | 19x+20=9 | | 19x+20=8 | | 19x+20=7 | | 19x+20=6 | | 19x+20=5 | | 19x+20=4 | | 19x+20=3 | | 19x+20=2 | | 19x+20=1 |