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Simplifying -22 = 4(u + -7) + -7u Reorder the terms: -22 = 4(-7 + u) + -7u -22 = (-7 * 4 + u * 4) + -7u -22 = (-28 + 4u) + -7u Combine like terms: 4u + -7u = -3u -22 = -28 + -3u Solving -22 = -28 + -3u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '3u' to each side of the equation. -22 + 3u = -28 + -3u + 3u Combine like terms: -3u + 3u = 0 -22 + 3u = -28 + 0 -22 + 3u = -28 Add '22' to each side of the equation. -22 + 22 + 3u = -28 + 22 Combine like terms: -22 + 22 = 0 0 + 3u = -28 + 22 3u = -28 + 22 Combine like terms: -28 + 22 = -6 3u = -6 Divide each side by '3'. u = -2 Simplifying u = -2
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