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Simplifying -31 = 4 + 5u Solving -31 = 4 + 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. -31 + -5u = 4 + 5u + -5u Combine like terms: 5u + -5u = 0 -31 + -5u = 4 + 0 -31 + -5u = 4 Add '31' to each side of the equation. -31 + 31 + -5u = 4 + 31 Combine like terms: -31 + 31 = 0 0 + -5u = 4 + 31 -5u = 4 + 31 Combine like terms: 4 + 31 = 35 -5u = 35 Divide each side by '-5'. u = -7 Simplifying u = -7
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