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Simplifying x2 + 3r + -8 = 0 Reorder the terms: -8 + 3r + x2 = 0 Solving -8 + 3r + x2 = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 3r + 8 + x2 = 0 + 8 Reorder the terms: -8 + 8 + 3r + x2 = 0 + 8 Combine like terms: -8 + 8 = 0 0 + 3r + x2 = 0 + 8 3r + x2 = 0 + 8 Combine like terms: 0 + 8 = 8 3r + x2 = 8 Add '-1x2' to each side of the equation. 3r + x2 + -1x2 = 8 + -1x2 Combine like terms: x2 + -1x2 = 0 3r + 0 = 8 + -1x2 3r = 8 + -1x2 Divide each side by '3'. r = 2.666666667 + -0.3333333333x2 Simplifying r = 2.666666667 + -0.3333333333x2
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