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12=45+2x
We simplify the equation to the form, which is simple to understand
12=45+2x
We move all terms containing x to the left and all other terms to the right.
-2x=+45-12
We simplify left and right side of the equation.
-2x=+33
We divide both sides of the equation by -02 to get x.
x=-16.5
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