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Simplifying x2 + 7r + -30 = 0 Reorder the terms: -30 + 7r + x2 = 0 Solving -30 + 7r + x2 = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '30' to each side of the equation. -30 + 7r + 30 + x2 = 0 + 30 Reorder the terms: -30 + 30 + 7r + x2 = 0 + 30 Combine like terms: -30 + 30 = 0 0 + 7r + x2 = 0 + 30 7r + x2 = 0 + 30 Combine like terms: 0 + 30 = 30 7r + x2 = 30 Add '-1x2' to each side of the equation. 7r + x2 + -1x2 = 30 + -1x2 Combine like terms: x2 + -1x2 = 0 7r + 0 = 30 + -1x2 7r = 30 + -1x2 Divide each side by '7'. r = 4.285714286 + -0.1428571429x2 Simplifying r = 4.285714286 + -0.1428571429x2
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