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Simplifying -5(-3r + 5) + 5r = 75 Reorder the terms: -5(5 + -3r) + 5r = 75 (5 * -5 + -3r * -5) + 5r = 75 (-25 + 15r) + 5r = 75 Combine like terms: 15r + 5r = 20r -25 + 20r = 75 Solving -25 + 20r = 75 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + 20r = 75 + 25 Combine like terms: -25 + 25 = 0 0 + 20r = 75 + 25 20r = 75 + 25 Combine like terms: 75 + 25 = 100 20r = 100 Divide each side by '20'. r = 5 Simplifying r = 5
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