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12w+15w-9+15=-3w+5-9
We simplify the equation to the form, which is simple to understand
12w+15w-9+15=-3w+5-9
We move all terms containing w to the left and all other terms to the right.
+12w+15w+3w=+5-9+9-15
We simplify left and right side of the equation.
+30w=-10
We divide both sides of the equation by 30 to get w.
w=-0.33333333333333
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