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Simplifying -23 = -7 + 4u Solving -23 = -7 + 4u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-4u' to each side of the equation. -23 + -4u = -7 + 4u + -4u Combine like terms: 4u + -4u = 0 -23 + -4u = -7 + 0 -23 + -4u = -7 Add '23' to each side of the equation. -23 + 23 + -4u = -7 + 23 Combine like terms: -23 + 23 = 0 0 + -4u = -7 + 23 -4u = -7 + 23 Combine like terms: -7 + 23 = 16 -4u = 16 Divide each side by '-4'. u = -4 Simplifying u = -4
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