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Simplifying 7u + -7 = 3(u + -5) Reorder the terms: -7 + 7u = 3(u + -5) Reorder the terms: -7 + 7u = 3(-5 + u) -7 + 7u = (-5 * 3 + u * 3) -7 + 7u = (-15 + 3u) Solving -7 + 7u = -15 + 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. -7 + 7u + -3u = -15 + 3u + -3u Combine like terms: 7u + -3u = 4u -7 + 4u = -15 + 3u + -3u Combine like terms: 3u + -3u = 0 -7 + 4u = -15 + 0 -7 + 4u = -15 Add '7' to each side of the equation. -7 + 7 + 4u = -15 + 7 Combine like terms: -7 + 7 = 0 0 + 4u = -15 + 7 4u = -15 + 7 Combine like terms: -15 + 7 = -8 4u = -8 Divide each side by '4'. u = -2 Simplifying u = -2
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