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-8x-13x=0
We simplify the equation to the form, which is simple to understand
-8x-13x=0
We move all terms containing x to the left and all other terms to the right.
-8x-13x=0
We simplify left and right side of the equation.
-21x=0
We divide both sides of the equation by -21 to get x.
x=-0
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