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Simplifying 2x2 + 7u + -15 = 0 Reorder the terms: -15 + 7u + 2x2 = 0 Solving -15 + 7u + 2x2 = 0 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 7u + 15 + 2x2 = 0 + 15 Reorder the terms: -15 + 15 + 7u + 2x2 = 0 + 15 Combine like terms: -15 + 15 = 0 0 + 7u + 2x2 = 0 + 15 7u + 2x2 = 0 + 15 Combine like terms: 0 + 15 = 15 7u + 2x2 = 15 Add '-2x2' to each side of the equation. 7u + 2x2 + -2x2 = 15 + -2x2 Combine like terms: 2x2 + -2x2 = 0 7u + 0 = 15 + -2x2 7u = 15 + -2x2 Divide each side by '7'. u = 2.142857143 + -0.2857142857x2 Simplifying u = 2.142857143 + -0.2857142857x2
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