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Simplifying 5u + -1 = 7(u + 7) Reorder the terms: -1 + 5u = 7(u + 7) Reorder the terms: -1 + 5u = 7(7 + u) -1 + 5u = (7 * 7 + u * 7) -1 + 5u = (49 + 7u) Solving -1 + 5u = 49 + 7u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-7u' to each side of the equation. -1 + 5u + -7u = 49 + 7u + -7u Combine like terms: 5u + -7u = -2u -1 + -2u = 49 + 7u + -7u Combine like terms: 7u + -7u = 0 -1 + -2u = 49 + 0 -1 + -2u = 49 Add '1' to each side of the equation. -1 + 1 + -2u = 49 + 1 Combine like terms: -1 + 1 = 0 0 + -2u = 49 + 1 -2u = 49 + 1 Combine like terms: 49 + 1 = 50 -2u = 50 Divide each side by '-2'. u = -25 Simplifying u = -25
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