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Simplifying -5 = -2(3 + -8r) + 5r -5 = (3 * -2 + -8r * -2) + 5r -5 = (-6 + 16r) + 5r Combine like terms: 16r + 5r = 21r -5 = -6 + 21r Solving -5 = -6 + 21r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-21r' to each side of the equation. -5 + -21r = -6 + 21r + -21r Combine like terms: 21r + -21r = 0 -5 + -21r = -6 + 0 -5 + -21r = -6 Add '5' to each side of the equation. -5 + 5 + -21r = -6 + 5 Combine like terms: -5 + 5 = 0 0 + -21r = -6 + 5 -21r = -6 + 5 Combine like terms: -6 + 5 = -1 -21r = -1 Divide each side by '-21'. r = 0.04761904762 Simplifying r = 0.04761904762
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