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Simplifying -3r + -1(4 + 4r) = -5 -3r + (4 * -1 + 4r * -1) = -5 -3r + (-4 + -4r) = -5 Reorder the terms: -4 + -3r + -4r = -5 Combine like terms: -3r + -4r = -7r -4 + -7r = -5 Solving -4 + -7r = -5 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 + -7r = -5 + 4 Combine like terms: -4 + 4 = 0 0 + -7r = -5 + 4 -7r = -5 + 4 Combine like terms: -5 + 4 = -1 -7r = -1 Divide each side by '-7'. r = 0.1428571429 Simplifying r = 0.1428571429
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