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2w-15=7w-90
We simplify the equation to the form, which is simple to understand
2w-15=7w-90
We move all terms containing w to the left and all other terms to the right.
+2w-7w=-90+15
We simplify left and right side of the equation.
-5w=-75
We divide both sides of the equation by -5 to get w.
w=15
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