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7x-12+9-3x=5x
We simplify the equation to the form, which is simple to understand
7x-12+9-3x=5x
We move all terms containing x to the left and all other terms to the right.
+7x-3x-5x=+12-9
We simplify left and right side of the equation.
-1x=+3
We divide both sides of the equation by -1 to get x.
x=-3
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