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-x-4(2x-1)=31
We move all terms to the left:
-x-4(2x-1)-(31)=0
We add all the numbers together, and all the variables
-1x-4(2x-1)-31=0
We multiply parentheses
-1x-8x+4-31=0
We add all the numbers together, and all the variables
-9x-27=0
We move all terms containing x to the left, all other terms to the right
-9x=27
x=27/-9
x=-3
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