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