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27=13-x
We move all terms to the left:
27-(13-x)=0
We add all the numbers together, and all the variables
-(-1x+13)+27=0
We get rid of parentheses
1x-13+27=0
We add all the numbers together, and all the variables
x+14=0
We move all terms containing x to the left, all other terms to the right
x=-14
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