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Simplifying 7(r + 3) + 8 = 0 Reorder the terms: 7(3 + r) + 8 = 0 (3 * 7 + r * 7) + 8 = 0 (21 + 7r) + 8 = 0 Reorder the terms: 21 + 8 + 7r = 0 Combine like terms: 21 + 8 = 29 29 + 7r = 0 Solving 29 + 7r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-29' to each side of the equation. 29 + -29 + 7r = 0 + -29 Combine like terms: 29 + -29 = 0 0 + 7r = 0 + -29 7r = 0 + -29 Combine like terms: 0 + -29 = -29 7r = -29 Divide each side by '7'. r = -4.142857143 Simplifying r = -4.142857143
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