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Simplifying -2r + -5(r + 3) = 0 Reorder the terms: -2r + -5(3 + r) = 0 -2r + (3 * -5 + r * -5) = 0 -2r + (-15 + -5r) = 0 Reorder the terms: -15 + -2r + -5r = 0 Combine like terms: -2r + -5r = -7r -15 + -7r = 0 Solving -15 + -7r = 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 + -7r = 0 + 15 Combine like terms: -15 + 15 = 0 0 + -7r = 0 + 15 -7r = 0 + 15 Combine like terms: 0 + 15 = 15 -7r = 15 Divide each side by '-7'. r = -2.142857143 Simplifying r = -2.142857143
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