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-x-\left(-4\right)=-x-x+1
Combine 3\left(-x\right) and -2\left(-x\right) to get -x.
-x+4=-x-x+1
The opposite of -4 is 4.
-x+4+x=-x+1
Add x to both sides.
-x+4+x+x=1
Add x to both sides.
-x+4+2x=1
Combine x and x to get 2x.
-x+2x=1-4
Subtract 4 from both sides.
-x+2x=-3
Subtract 4 from 1 to get -3.
x=-3
Combine -x and 2x to get x.