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Simplifying -8u + 4(u + 7) = 8 Reorder the terms: -8u + 4(7 + u) = 8 -8u + (7 * 4 + u * 4) = 8 -8u + (28 + 4u) = 8 Reorder the terms: 28 + -8u + 4u = 8 Combine like terms: -8u + 4u = -4u 28 + -4u = 8 Solving 28 + -4u = 8 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. 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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