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129=-x+174
We move all terms to the left:
129-(-x+174)=0
We add all the numbers together, and all the variables
-(-1x+174)+129=0
We get rid of parentheses
1x-174+129=0
We add all the numbers together, and all the variables
x-45=0
We move all terms containing x to the left, all other terms to the right
x=45
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