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4 + x = -x - 4
We simplify the equation to the form, which is simple to understand
4+x=-x-4
We move all terms containing x to the left and all other terms to the right.
+1x+1x=-4-4
We simplify left and right side of the equation.
+2x=-8
We divide both sides of the equation by 2 to get x.
x=-4
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