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-8w--7w=18
We simplify the equation to the form, which is simple to understand
-8w+7w=18
We move all terms containing w to the left and all other terms to the right.
-8w+7w=+18
We simplify left and right side of the equation.
-1w=+18
We divide both sides of the equation by -1 to get w.
w=-18
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