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Simplifying -81 = 6w + -13w + -18 Reorder the terms: -81 = -18 + 6w + -13w Combine like terms: 6w + -13w = -7w -81 = -18 + -7w Solving -81 = -18 + -7w Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '7w' to each side of the equation. -81 + 7w = -18 + -7w + 7w Combine like terms: -7w + 7w = 0 -81 + 7w = -18 + 0 -81 + 7w = -18 Add '81' to each side of the equation. -81 + 81 + 7w = -18 + 81 Combine like terms: -81 + 81 = 0 0 + 7w = -18 + 81 7w = -18 + 81 Combine like terms: -18 + 81 = 63 7w = 63 Divide each side by '7'. w = 9 Simplifying w = 9
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