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Simplifying 3x + -7u = 20 Reorder the terms: -7u + 3x = 20 Solving -7u + 3x = 20 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '-3x' to each side of the equation. -7u + 3x + -3x = 20 + -3x Combine like terms: 3x + -3x = 0 -7u + 0 = 20 + -3x -7u = 20 + -3x Divide each side by '-7'. u = -2.857142857 + 0.4285714286x Simplifying u = -2.857142857 + 0.4285714286x
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