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8=213-x
We move all terms to the left:
8-(213-x)=0
We add all the numbers together, and all the variables
-(-1x+213)+8=0
We get rid of parentheses
1x-213+8=0
We add all the numbers together, and all the variables
x-205=0
We move all terms containing x to the left, all other terms to the right
x=205
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