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Simplifying -4 = -8r + -1(-5r + 2) Reorder the terms: -4 = -8r + -1(2 + -5r) -4 = -8r + (2 * -1 + -5r * -1) -4 = -8r + (-2 + 5r) Reorder the terms: -4 = -2 + -8r + 5r Combine like terms: -8r + 5r = -3r -4 = -2 + -3r Solving -4 = -2 + -3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '3r' to each side of the equation. -4 + 3r = -2 + -3r + 3r Combine like terms: -3r + 3r = 0 -4 + 3r = -2 + 0 -4 + 3r = -2 Add '4' to each side of the equation. -4 + 4 + 3r = -2 + 4 Combine like terms: -4 + 4 = 0 0 + 3r = -2 + 4 3r = -2 + 4 Combine like terms: -2 + 4 = 2 3r = 2 Divide each side by '3'. r = 0.6666666667 Simplifying r = 0.6666666667
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