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6x+4+7x=-139
We simplify the equation to the form, which is simple to understand
6x+4+7x=-139
We move all terms containing x to the left and all other terms to the right.
+6x+7x=-139-4
We simplify left and right side of the equation.
+13x=-143
We divide both sides of the equation by 13 to get x.
x=-11
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