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-1-2x-7=18
We simplify the equation to the form, which is simple to understand
-1-2x-7=18
We move all terms containing x to the left and all other terms to the right.
-2x=+18+1+7
We simplify left and right side of the equation.
-2x=+26
We divide both sides of the equation by -2 to get x.
x=-13
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