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