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168=-x+66
We move all terms to the left:
168-(-x+66)=0
We add all the numbers together, and all the variables
-(-1x+66)+168=0
We get rid of parentheses
1x-66+168=0
We add all the numbers together, and all the variables
x+102=0
We move all terms containing x to the left, all other terms to the right
x=-102
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