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Simplifying -4u + 28 = 4(u + -1) Reorder the terms: 28 + -4u = 4(u + -1) Reorder the terms: 28 + -4u = 4(-1 + u) 28 + -4u = (-1 * 4 + u * 4) 28 + -4u = (-4 + 4u) Solving 28 + -4u = -4 + 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 + -4u = -4 + 4u + -4u Combine like terms: -4u + -4u = -8u 28 + -8u = -4 + 4u + -4u Combine like terms: 4u + -4u = 0 28 + -8u = -4 + 0 28 + -8u = -4 Add '-28' to each side of the equation. 28 + -28 + -8u = -4 + -28 Combine like terms: 28 + -28 = 0 0 + -8u = -4 + -28 -8u = -4 + -28 Combine like terms: -4 + -28 = -32 -8u = -32 Divide each side by '-8'. u = 4 Simplifying u = 4
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