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Simplifying -3 = 7 + 2u Solving -3 = 7 + 2u Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-2u' to each side of the equation. -3 + -2u = 7 + 2u + -2u Combine like terms: 2u + -2u = 0 -3 + -2u = 7 + 0 -3 + -2u = 7 Add '3' to each side of the equation. -3 + 3 + -2u = 7 + 3 Combine like terms: -3 + 3 = 0 0 + -2u = 7 + 3 -2u = 7 + 3 Combine like terms: 7 + 3 = 10 -2u = 10 Divide each side by '-2'. u = -5 Simplifying u = -5
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