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7x--4=0
We simplify the equation to the form, which is simple to understand
7x+4=0
We move all terms containing x to the left and all other terms to the right.
+7x=0-4
We simplify left and right side of the equation.
+7x=-4
We divide both sides of the equation by 7 to get x.
x=-0.57142857142857
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