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9x+3(-3x-5)=-12-3x
We simplify the equation to the form, which is simple to understand
9x+3(-3x-5)=-12-3x
Reorder the terms in parentheses
9x+(-9x-15)=-12-3x
Remove unnecessary parentheses
+9x-9x-15=-12-3x
We move all terms containing x to the left and all other terms to the right.
+9x-9x+3x=-12+15
We simplify left and right side of the equation.
+3x=+3
We divide both sides of the equation by 3 to get x.
x=1
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