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Simplifying (7u + 7) + 2 = ((4u + -8) * 7) + 31 Reorder the terms: (7 + 7u) + 2 = ((4u + -8) * 7) + 31 Remove parenthesis around (7 + 7u) 7 + 7u + 2 = ((4u + -8) * 7) + 31 Reorder the terms: 7 + 2 + 7u = ((4u + -8) * 7) + 31 Combine like terms: 7 + 2 = 9 9 + 7u = ((4u + -8) * 7) + 31 Reorder the terms: 9 + 7u = ((-8 + 4u) * 7) + 31 Reorder the terms for easier multiplication: 9 + 7u = (7(-8 + 4u)) + 31 9 + 7u = ((-8 * 7 + 4u * 7)) + 31 9 + 7u = ((-56 + 28u)) + 31 9 + 7u = (-56 + 28u) + 31 Remove parenthesis around (-56 + 28u) 9 + 7u = -56 + 28u + 31 Reorder the terms: 9 + 7u = -56 + 31 + 28u Combine like terms: -56 + 31 = -25 9 + 7u = -25 + 28u Solving 9 + 7u = -25 + 28u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-28u' to each side of the equation. 9 + 7u + -28u = -25 + 28u + -28u Combine like terms: 7u + -28u = -21u 9 + -21u = -25 + 28u + -28u Combine like terms: 28u + -28u = 0 9 + -21u = -25 + 0 9 + -21u = -25 Add '-9' to each side of the equation. 9 + -9 + -21u = -25 + -9 Combine like terms: 9 + -9 = 0 0 + -21u = -25 + -9 -21u = -25 + -9 Combine like terms: -25 + -9 = -34 -21u = -34 Divide each side by '-21'. u = 1.619047619 Simplifying u = 1.619047619
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