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13=6x-2x+9
We move all terms to the left:
13-(6x-2x+9)=0
We add all the numbers together, and all the variables
-(4x+9)+13=0
We get rid of parentheses
-4x-9+13=0
We add all the numbers together, and all the variables
-4x+4=0
We move all terms containing x to the left, all other terms to the right
-4x=-4
x=-4/-4
x=1
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