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Simplifying 3r + -5(3r + -3) = 0 Reorder the terms: 3r + -5(-3 + 3r) = 0 3r + (-3 * -5 + 3r * -5) = 0 3r + (15 + -15r) = 0 Reorder the terms: 15 + 3r + -15r = 0 Combine like terms: 3r + -15r = -12r 15 + -12r = 0 Solving 15 + -12r = 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 + -12r = 0 + -15 Combine like terms: 15 + -15 = 0 0 + -12r = 0 + -15 -12r = 0 + -15 Combine like terms: 0 + -15 = -15 -12r = -15 Divide each side by '-12'. r = 1.25 Simplifying r = 1.25
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