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Simplifying 12u + -84 = 5u Reorder the terms: -84 + 12u = 5u Solving -84 + 12u = 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. -84 + 12u + -5u = 5u + -5u Combine like terms: 12u + -5u = 7u -84 + 7u = 5u + -5u Combine like terms: 5u + -5u = 0 -84 + 7u = 0 Add '84' to each side of the equation. -84 + 84 + 7u = 0 + 84 Combine like terms: -84 + 84 = 0 0 + 7u = 0 + 84 7u = 0 + 84 Combine like terms: 0 + 84 = 84 7u = 84 Divide each side by '7'. u = 12 Simplifying u = 12
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