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6x+7x-84=108-8x
We move all terms to the left:
6x+7x-84-(108-8x)=0
We add all the numbers together, and all the variables
6x+7x-(-8x+108)-84=0
We add all the numbers together, and all the variables
13x-(-8x+108)-84=0
We get rid of parentheses
13x+8x-108-84=0
We add all the numbers together, and all the variables
21x-192=0
We move all terms containing x to the left, all other terms to the right
21x=192
x=192/21
x=9+1/7
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