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w+15+2w+30=180
We simplify the equation to the form, which is simple to understand
w+15+2w+30=180
We move all terms containing w to the left and all other terms to the right.
+1w+2w=+180-15-30
We simplify left and right side of the equation.
+3w=+135
We divide both sides of the equation by 3 to get w.
w=45
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