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Simplifying -9(7r + 8) = -19 Reorder the terms: -9(8 + 7r) = -19 (8 * -9 + 7r * -9) = -19 (-72 + -63r) = -19 Solving -72 + -63r = -19 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '72' to each side of the equation. -72 + 72 + -63r = -19 + 72 Combine like terms: -72 + 72 = 0 0 + -63r = -19 + 72 -63r = -19 + 72 Combine like terms: -19 + 72 = 53 -63r = 53 Divide each side by '-63'. r = -0.8412698413 Simplifying r = -0.8412698413
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