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5+12-4w=5w+13-9w
We simplify the equation to the form, which is simple to understand
5+12-4w=5w+13-9w
We move all terms containing w to the left and all other terms to the right.
-4w-5w+9w=+13-5-12
We simplify left and right side of the equation.
w=-4
0=-4
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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