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Simplifying 1 + 2r = 1 + -2r Add '-1' to each side of the equation. 1 + -1 + 2r = 1 + -1 + -2r Combine like terms: 1 + -1 = 0 0 + 2r = 1 + -1 + -2r 2r = 1 + -1 + -2r Combine like terms: 1 + -1 = 0 2r = 0 + -2r 2r = -2r Solving 2r = -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. 2r + 2r = -2r + 2r Combine like terms: 2r + 2r = 4r 4r = -2r + 2r Combine like terms: -2r + 2r = 0 4r = 0 Divide each side by '4'. r = 0 Simplifying r = 0
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