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Simplifying -5r + 7r = r + 5 + 2r + -5 Combine like terms: -5r + 7r = 2r 2r = r + 5 + 2r + -5 Reorder the terms: 2r = 5 + -5 + r + 2r Combine like terms: 5 + -5 = 0 2r = 0 + r + 2r 2r = r + 2r Combine like terms: r + 2r = 3r 2r = 3r Solving 2r = 3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3r' to each side of the equation. 2r + -3r = 3r + -3r Combine like terms: 2r + -3r = -1r -1r = 3r + -3r Combine like terms: 3r + -3r = 0 -1r = 0 Divide each side by '-1'. r = 0 Simplifying r = 0
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