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1x + 5 = 18

1x = 18 - 5

1x = 13 (divide both sides by 1 to get x)

1x/1 = 13/1

x = 13

| x+5=17 | | x+5=16 | | x+5=15 | | x+5=14 | | x+5=13 | | x+5=12 | | x+5=11 | | x+5=10 | | x+4=20 | | x+4=19 | | x+4=18 | | x+4=17 | | x+4=16 | | x+4=15 | | x+4=14 | | x+4=13 | | x+4=12 | | x+4=11 | | x+4=10 |

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