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Simplifying -1(r + 8) = 5r Reorder the terms: -1(8 + r) = 5r (8 * -1 + r * -1) = 5r (-8 + -1r) = 5r Solving -8 + -1r = 5r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-5r' to each side of the equation. -8 + -1r + -5r = 5r + -5r Combine like terms: -1r + -5r = -6r -8 + -6r = 5r + -5r Combine like terms: 5r + -5r = 0 -8 + -6r = 0 Add '8' to each side of the equation. -8 + 8 + -6r = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -6r = 0 + 8 -6r = 0 + 8 Combine like terms: 0 + 8 = 8 -6r = 8 Divide each side by '-6'. r = -1.333333333 Simplifying r = -1.333333333
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