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Simplifying -2(9r + 7) = 0 Reorder the terms: -2(7 + 9r) = 0 (7 * -2 + 9r * -2) = 0 (-14 + -18r) = 0 Solving -14 + -18r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + -18r = 0 + 14 Combine like terms: -14 + 14 = 0 0 + -18r = 0 + 14 -18r = 0 + 14 Combine like terms: 0 + 14 = 14 -18r = 14 Divide each side by '-18'. r = -0.7777777778 Simplifying r = -0.7777777778
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