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Simplifying -3u + 15u + 7 = -8 + 43 Reorder the terms: 7 + -3u + 15u = -8 + 43 Combine like terms: -3u + 15u = 12u 7 + 12u = -8 + 43 Combine like terms: -8 + 43 = 35 7 + 12u = 35 Solving 7 + 12u = 35 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 12u = 35 + -7 Combine like terms: 7 + -7 = 0 0 + 12u = 35 + -7 12u = 35 + -7 Combine like terms: 35 + -7 = 28 12u = 28 Divide each side by '12'. u = 2.333333333 Simplifying u = 2.333333333
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