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