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Simplifying 28 = 4(u + -2) + -8u Reorder the terms: 28 = 4(-2 + u) + -8u 28 = (-2 * 4 + u * 4) + -8u 28 = (-8 + 4u) + -8u Combine like terms: 4u + -8u = -4u 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 = -36 4u = -36 Divide each side by '4'. u = -9 Simplifying u = -9
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