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Simplifying 7r + 4(1 + r) = 0 7r + (1 * 4 + r * 4) = 0 7r + (4 + 4r) = 0 Reorder the terms: 4 + 7r + 4r = 0 Combine like terms: 7r + 4r = 11r 4 + 11r = 0 Solving 4 + 11r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 11r = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 11r = 0 + -4 11r = 0 + -4 Combine like terms: 0 + -4 = -4 11r = -4 Divide each side by '11'. r = -0.3636363636 Simplifying r = -0.3636363636
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