Solve for x
x=-3
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-3x+1-x=13
Subtract x from both sides.
-4x+1=13
Combine -3x and -x to get -4x.
-4x=13-1
Subtract 1 from both sides.
-4x=12
Subtract 1 from 13 to get 12.
x=\frac{12}{-4}
Divide both sides by -4.
x=-3
Divide 12 by -4 to get -3.
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