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