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Simplifying -110 + 3(u + -7) = -7(3 + u) Reorder the terms: -110 + 3(-7 + u) = -7(3 + u) -110 + (-7 * 3 + u * 3) = -7(3 + u) -110 + (-21 + 3u) = -7(3 + u) Combine like terms: -110 + -21 = -131 -131 + 3u = -7(3 + u) -131 + 3u = (3 * -7 + u * -7) -131 + 3u = (-21 + -7u) Solving -131 + 3u = -21 + -7u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '7u' to each side of the equation. -131 + 3u + 7u = -21 + -7u + 7u Combine like terms: 3u + 7u = 10u -131 + 10u = -21 + -7u + 7u Combine like terms: -7u + 7u = 0 -131 + 10u = -21 + 0 -131 + 10u = -21 Add '131' to each side of the equation. -131 + 131 + 10u = -21 + 131 Combine like terms: -131 + 131 = 0 0 + 10u = -21 + 131 10u = -21 + 131 Combine like terms: -21 + 131 = 110 10u = 110 Divide each side by '10'. u = 11 Simplifying u = 11
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