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1x + 3 = 19

1x = 19 - 3

1x = 16 (divide both sides by 1 to get x)

1x/1 = 16/1

x = 16

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

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