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Simplifying -5(r + 3) = -79 Reorder the terms: -5(3 + r) = -79 (3 * -5 + r * -5) = -79 (-15 + -5r) = -79 Solving -15 + -5r = -79 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + -5r = -79 + 15 Combine like terms: -15 + 15 = 0 0 + -5r = -79 + 15 -5r = -79 + 15 Combine like terms: -79 + 15 = -64 -5r = -64 Divide each side by '-5'. r = 12.8 Simplifying r = 12.8
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