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Simplifying -3u + -1w = u + 7w Solving -3u + -1w = u + 7w Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-1u' to each side of the equation. -3u + -1u + -1w = u + -1u + 7w Combine like terms: -3u + -1u = -4u -4u + -1w = u + -1u + 7w Combine like terms: u + -1u = 0 -4u + -1w = 0 + 7w -4u + -1w = 7w Add 'w' to each side of the equation. -4u + -1w + w = 7w + w Combine like terms: -1w + w = 0 -4u + 0 = 7w + w -4u = 7w + w Combine like terms: 7w + w = 8w -4u = 8w Divide each side by '-4'. u = -2w Simplifying u = -2w
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