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1x + 3 = 20

1x = 20 - 3

1x = 17 (divide both sides by 1 to get x)

1x/1 = 17/1

x = 17

| x+3=19 | | x+3=18 | | x+3=17 | | x+3=16 | | x+3=15 | | x+3=14 | | x+3=13 | | x+3=12 | | x+3=11 | | x+3=10 | | x+2=20 | | x+2=19 | | x+2=18 | | x+2=17 | | x+2=16 | | x+2=15 | | x+2=14 | | x+2=13 | | x+2=12 | | x+2=11 | | x+2=10 |

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