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9x+3+3x=8x-9
We simplify the equation to the form, which is simple to understand
9x+3+3x=8x-9
We move all terms containing x to the left and all other terms to the right.
+9x+3x-8x=-9-3
We simplify left and right side of the equation.
+4x=-12
We divide both sides of the equation by 4 to get x.
x=-3
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