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Simplifying -7u + -20 = 5(u + 8) Reorder the terms: -20 + -7u = 5(u + 8) Reorder the terms: -20 + -7u = 5(8 + u) -20 + -7u = (8 * 5 + u * 5) -20 + -7u = (40 + 5u) Solving -20 + -7u = 40 + 5u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-5u' to each side of the equation. -20 + -7u + -5u = 40 + 5u + -5u Combine like terms: -7u + -5u = -12u -20 + -12u = 40 + 5u + -5u Combine like terms: 5u + -5u = 0 -20 + -12u = 40 + 0 -20 + -12u = 40 Add '20' to each side of the equation. -20 + 20 + -12u = 40 + 20 Combine like terms: -20 + 20 = 0 0 + -12u = 40 + 20 -12u = 40 + 20 Combine like terms: 40 + 20 = 60 -12u = 60 Divide each side by '-12'. u = -5 Simplifying u = -5
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