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4x-1=-x-31
We move all terms to the left:
4x-1-(-x-31)=0
We add all the numbers together, and all the variables
4x-(-1x-31)-1=0
We get rid of parentheses
4x+1x+31-1=0
We add all the numbers together, and all the variables
5x+30=0
We move all terms containing x to the left, all other terms to the right
5x=-30
x=-30/5
x=-6
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