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-x-1-3x-8x=-1
Subtract 8x from both sides.
-x-1-11x=-1
Combine -3x and -8x to get -11x.
-x-11x=-1+1
Add 1 to both sides.
-x-11x=0
Add -1 and 1 to get 0.
-12x=0
Combine -x and -11x to get -12x.
x=0
Product of two numbers is equal to 0 if at least one of them is 0. Since -12 is not equal to 0, x must be equal to 0.