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x+20x+40=0
We simplify the equation to the form, which is simple to understand
x+20x+40=0
We move all terms containing x to the left and all other terms to the right.
+1x+20x=0-40
We simplify left and right side of the equation.
+21x=-40
We divide both sides of the equation by 21 to get x.
x=-1.9047619047619
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