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3=2x-3+15
We simplify the equation to the form, which is simple to understand
3=2x-3+15
We move all terms containing x to the left and all other terms to the right.
-2x=-3+15-3
We simplify left and right side of the equation.
-2x=+9
We divide both sides of the equation by -02 to get x.
x=-4.5
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