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