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Simplifying -2(-5r + 2) = -84 Reorder the terms: -2(2 + -5r) = -84 (2 * -2 + -5r * -2) = -84 (-4 + 10r) = -84 Solving -4 + 10r = -84 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 10r = -84 + 4 Combine like terms: -4 + 4 = 0 0 + 10r = -84 + 4 10r = -84 + 4 Combine like terms: -84 + 4 = -80 10r = -80 Divide each side by '10'. r = -8 Simplifying r = -8
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