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Simplifying -2u + 7(u + -7) = -4 Reorder the terms: -2u + 7(-7 + u) = -4 -2u + (-7 * 7 + u * 7) = -4 -2u + (-49 + 7u) = -4 Reorder the terms: -49 + -2u + 7u = -4 Combine like terms: -2u + 7u = 5u -49 + 5u = -4 Solving -49 + 5u = -4 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '49' to each side of the equation. -49 + 49 + 5u = -4 + 49 Combine like terms: -49 + 49 = 0 0 + 5u = -4 + 49 5u = -4 + 49 Combine like terms: -4 + 49 = 45 5u = 45 Divide each side by '5'. u = 9 Simplifying u = 9
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