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Simplifying 7u + 8(u + -7) = -11 Reorder the terms: 7u + 8(-7 + u) = -11 7u + (-7 * 8 + u * 8) = -11 7u + (-56 + 8u) = -11 Reorder the terms: -56 + 7u + 8u = -11 Combine like terms: 7u + 8u = 15u -56 + 15u = -11 Solving -56 + 15u = -11 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '56' to each side of the equation. -56 + 56 + 15u = -11 + 56 Combine like terms: -56 + 56 = 0 0 + 15u = -11 + 56 15u = -11 + 56 Combine like terms: -11 + 56 = 45 15u = 45 Divide each side by '15'. u = 3 Simplifying u = 3
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