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x+18x+81=0
We simplify the equation to the form, which is simple to understand
x+18x+81=0
We move all terms containing x to the left and all other terms to the right.
+1x+18x=0-81
We simplify left and right side of the equation.
+19x=-81
We divide both sides of the equation by 19 to get x.
x=-4.2631578947368
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