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Simplifying -15(5r + -1) = 0 Reorder the terms: -15(-1 + 5r) = 0 (-1 * -15 + 5r * -15) = 0 (15 + -75r) = 0 Solving 15 + -75r = 0 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 + -75r = 0 + -15 Combine like terms: 15 + -15 = 0 0 + -75r = 0 + -15 -75r = 0 + -15 Combine like terms: 0 + -15 = -15 -75r = -15 Divide each side by '-75'. r = 0.2 Simplifying r = 0.2
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