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Simplifying 3(6r + -5) + -7r = 81 Reorder the terms: 3(-5 + 6r) + -7r = 81 (-5 * 3 + 6r * 3) + -7r = 81 (-15 + 18r) + -7r = 81 Combine like terms: 18r + -7r = 11r -15 + 11r = 81 Solving -15 + 11r = 81 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 + 11r = 81 + 15 Combine like terms: -15 + 15 = 0 0 + 11r = 81 + 15 11r = 81 + 15 Combine like terms: 81 + 15 = 96 11r = 96 Divide each side by '11'. r = 8.727272727 Simplifying r = 8.727272727
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