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Simplifying -30 + 9r = 5(6r + -4) Reorder the terms: -30 + 9r = 5(-4 + 6r) -30 + 9r = (-4 * 5 + 6r * 5) -30 + 9r = (-20 + 30r) Solving -30 + 9r = -20 + 30r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-30r' to each side of the equation. -30 + 9r + -30r = -20 + 30r + -30r Combine like terms: 9r + -30r = -21r -30 + -21r = -20 + 30r + -30r Combine like terms: 30r + -30r = 0 -30 + -21r = -20 + 0 -30 + -21r = -20 Add '30' to each side of the equation. -30 + 30 + -21r = -20 + 30 Combine like terms: -30 + 30 = 0 0 + -21r = -20 + 30 -21r = -20 + 30 Combine like terms: -20 + 30 = 10 -21r = 10 Divide each side by '-21'. r = -0.4761904762 Simplifying r = -0.4761904762
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