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Simplifying 2r + -1r + r + 3 = 17 Reorder the terms: 3 + 2r + -1r + r = 17 Combine like terms: 2r + -1r = 1r 3 + 1r + r = 17 Combine like terms: 1r + r = 2r 3 + 2r = 17 Solving 3 + 2r = 17 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 2r = 17 + -3 Combine like terms: 3 + -3 = 0 0 + 2r = 17 + -3 2r = 17 + -3 Combine like terms: 17 + -3 = 14 2r = 14 Divide each side by '2'. r = 7 Simplifying r = 7
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