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5x+12=-40-8x
We simplify the equation to the form, which is simple to understand
5x+12=-40-8x
We move all terms containing x to the left and all other terms to the right.
+5x+8x=-40-12
We simplify left and right side of the equation.
+13x=-52
We divide both sides of the equation by 13 to get x.
x=-4
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