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x+x=8+x-x+6
We move all terms to the left:
x+x-(8+x-x+6)=0
We add all the numbers together, and all the variables
x+x-14=0
We add all the numbers together, and all the variables
2x-14=0
We move all terms containing x to the left, all other terms to the right
2x=14
x=14/2
x=7
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