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Simplifying -13 = u + -7 Reorder the terms: -13 = -7 + u Solving -13 = -7 + u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-1u' to each side of the equation. -13 + -1u = -7 + u + -1u Combine like terms: u + -1u = 0 -13 + -1u = -7 + 0 -13 + -1u = -7 Add '13' to each side of the equation. -13 + 13 + -1u = -7 + 13 Combine like terms: -13 + 13 = 0 0 + -1u = -7 + 13 -1u = -7 + 13 Combine like terms: -7 + 13 = 6 -1u = 6 Divide each side by '-1'. u = -6 Simplifying u = -6
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