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Simplifying -1r + 8(5r + -2) = 0 Reorder the terms: -1r + 8(-2 + 5r) = 0 -1r + (-2 * 8 + 5r * 8) = 0 -1r + (-16 + 40r) = 0 Reorder the terms: -16 + -1r + 40r = 0 Combine like terms: -1r + 40r = 39r -16 + 39r = 0 Solving -16 + 39r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + 39r = 0 + 16 Combine like terms: -16 + 16 = 0 0 + 39r = 0 + 16 39r = 0 + 16 Combine like terms: 0 + 16 = 16 39r = 16 Divide each side by '39'. r = 0.4102564103 Simplifying r = 0.4102564103
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