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2w+8-7w=12-(3w-1)
We simplify the equation to the form, which is simple to understand
2w+8-7w=12-(3w-1)
Remove unnecessary parentheses
2w+8-7w=12-3w+1
We move all terms containing w to the left and all other terms to the right.
+2w-7w+3w=+12+1-8
We simplify left and right side of the equation.
-2w=+5
We divide both sides of the equation by -2 to get w.
w=-2.5
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