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Simplifying -1 = r + -1 + 2r Reorder the terms: -1 = -1 + r + 2r Combine like terms: r + 2r = 3r -1 = -1 + 3r Add '1' to each side of the equation. -1 + 1 = -1 + 1 + 3r Combine like terms: -1 + 1 = 0 0 = -1 + 1 + 3r Combine like terms: -1 + 1 = 0 0 = 0 + 3r 0 = 3r Solving 0 = 3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3r' to each side of the equation. 0 + -3r = 3r + -3r Remove the zero: -3r = 3r + -3r Combine like terms: 3r + -3r = 0 -3r = 0 Divide each side by '-3'. r = 0 Simplifying r = 0
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