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-2x-4+(-x+13)+(-7x+1)=180
We move all terms to the left:
-2x-4+(-x+13)+(-7x+1)-(180)=0
We add all the numbers together, and all the variables
-2x+(-1x+13)+(-7x+1)-4-180=0
We add all the numbers together, and all the variables
-2x+(-1x+13)+(-7x+1)-184=0
We get rid of parentheses
-2x-1x-7x+13+1-184=0
We add all the numbers together, and all the variables
-10x-170=0
We move all terms containing x to the left, all other terms to the right
-10x=170
x=170/-10
x=-17
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