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Simplifying 1r + -1 + 4 = 2r + -1 Reorder the terms: -1 + 4 + 1r = 2r + -1 Combine like terms: -1 + 4 = 3 3 + 1r = 2r + -1 Reorder the terms: 3 + 1r = -1 + 2r Solving 3 + 1r = -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. 3 + 1r + -2r = -1 + 2r + -2r Combine like terms: 1r + -2r = -1r 3 + -1r = -1 + 2r + -2r Combine like terms: 2r + -2r = 0 3 + -1r = -1 + 0 3 + -1r = -1 Add '-3' to each side of the equation. 3 + -3 + -1r = -1 + -3 Combine like terms: 3 + -3 = 0 0 + -1r = -1 + -3 -1r = -1 + -3 Combine like terms: -1 + -3 = -4 -1r = -4 Divide each side by '-1'. r = 4 Simplifying r = 4
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