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13x-3x-9=8x+4-11x
We move all terms to the left:
13x-3x-9-(8x+4-11x)=0
We add all the numbers together, and all the variables
13x-3x-(-3x+4)-9=0
We add all the numbers together, and all the variables
10x-(-3x+4)-9=0
We get rid of parentheses
10x+3x-4-9=0
We add all the numbers together, and all the variables
13x-13=0
We move all terms containing x to the left, all other terms to the right
13x=13
x=13/13
x=1
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