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x*6+12=9*x
We simplify the equation to the form, which is simple to understand
x*6+12=9*x
We move all terms containing x to the left and all other terms to the right.
+6x-9x=-12
We simplify left and right side of the equation.
-3x=-12
We divide both sides of the equation by -3 to get x.
x=4
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