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