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Simplifying 9r + -2(2r + 9) = -3 Reorder the terms: 9r + -2(9 + 2r) = -3 9r + (9 * -2 + 2r * -2) = -3 9r + (-18 + -4r) = -3 Reorder the terms: -18 + 9r + -4r = -3 Combine like terms: 9r + -4r = 5r -18 + 5r = -3 Solving -18 + 5r = -3 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + 5r = -3 + 18 Combine like terms: -18 + 18 = 0 0 + 5r = -3 + 18 5r = -3 + 18 Combine like terms: -3 + 18 = 15 5r = 15 Divide each side by '5'. r = 3 Simplifying r = 3
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