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(4x+12)+7x=0
We simplify the equation to the form, which is simple to understand
(4x+12)+7x=0
Remove unnecessary parentheses
4x+12+7x=0
We move all terms containing x to the left and all other terms to the right.
+4x+7x=0-12
We simplify left and right side of the equation.
+11x=-12
We divide both sides of the equation by 11 to get x.
x=-1.0909090909091
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