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Simplifying 2(8 + -3r) + 5 = 0 (8 * 2 + -3r * 2) + 5 = 0 (16 + -6r) + 5 = 0 Reorder the terms: 16 + 5 + -6r = 0 Combine like terms: 16 + 5 = 21 21 + -6r = 0 Solving 21 + -6r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + -6r = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -6r = 0 + -21 -6r = 0 + -21 Combine like terms: 0 + -21 = -21 -6r = -21 Divide each side by '-6'. r = 3.5 Simplifying r = 3.5
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