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1x + 1 = 13

1x = 13 - 1

1x = 12 (divide both sides by 1 to get x)

1x/1 = 12/1

x = 12

| 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 | | 3x-2=8 | | 9x-3=6 | | x+8=13 | | 12+x=5 | | 4x-2=12 | | 3x=12 | | 6x-2=14 | | 2x+10=12 | | 3x+2=18 |

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