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Simplifying -28 = -8 + 4u Solving -28 = -8 + 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. -28 + -4u = -8 + 4u + -4u Combine like terms: 4u + -4u = 0 -28 + -4u = -8 + 0 -28 + -4u = -8 Add '28' to each side of the equation. -28 + 28 + -4u = -8 + 28 Combine like terms: -28 + 28 = 0 0 + -4u = -8 + 28 -4u = -8 + 28 Combine like terms: -8 + 28 = 20 -4u = 20 Divide each side by '-4'. u = -5 Simplifying u = -5
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