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Simplifying r + -1 = 2 + -2r Reorder the terms: -1 + r = 2 + -2r Solving -1 + r = 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. -1 + r + 2r = 2 + -2r + 2r Combine like terms: r + 2r = 3r -1 + 3r = 2 + -2r + 2r Combine like terms: -2r + 2r = 0 -1 + 3r = 2 + 0 -1 + 3r = 2 Add '1' to each side of the equation. -1 + 1 + 3r = 2 + 1 Combine like terms: -1 + 1 = 0 0 + 3r = 2 + 1 3r = 2 + 1 Combine like terms: 2 + 1 = 3 3r = 3 Divide each side by '3'. r = 1 Simplifying r = 1
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