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Simplifying 15 + -2u = -13 + 5u Solving 15 + -2u = -13 + 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. 15 + -2u + -5u = -13 + 5u + -5u Combine like terms: -2u + -5u = -7u 15 + -7u = -13 + 5u + -5u Combine like terms: 5u + -5u = 0 15 + -7u = -13 + 0 15 + -7u = -13 Add '-15' to each side of the equation. 15 + -15 + -7u = -13 + -15 Combine like terms: 15 + -15 = 0 0 + -7u = -13 + -15 -7u = -13 + -15 Combine like terms: -13 + -15 = -28 -7u = -28 Divide each side by '-7'. u = 4 Simplifying u = 4
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