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Simplifying -9u + -7 = -8u Reorder the terms: -7 + -9u = -8u Solving -7 + -9u = -8u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '8u' to each side of the equation. -7 + -9u + 8u = -8u + 8u Combine like terms: -9u + 8u = -1u -7 + -1u = -8u + 8u Combine like terms: -8u + 8u = 0 -7 + -1u = 0 Add '7' to each side of the equation. -7 + 7 + -1u = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1u = 0 + 7 -1u = 0 + 7 Combine like terms: 0 + 7 = 7 -1u = 7 Divide each side by '-1'. u = -7 Simplifying u = -7
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