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Simplifying 9 + 7r + -7 = 5r + 14 + -2r Reorder the terms: 9 + -7 + 7r = 5r + 14 + -2r Combine like terms: 9 + -7 = 2 2 + 7r = 5r + 14 + -2r Reorder the terms: 2 + 7r = 14 + 5r + -2r Combine like terms: 5r + -2r = 3r 2 + 7r = 14 + 3r Solving 2 + 7r = 14 + 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. 2 + 7r + -3r = 14 + 3r + -3r Combine like terms: 7r + -3r = 4r 2 + 4r = 14 + 3r + -3r Combine like terms: 3r + -3r = 0 2 + 4r = 14 + 0 2 + 4r = 14 Add '-2' to each side of the equation. 2 + -2 + 4r = 14 + -2 Combine like terms: 2 + -2 = 0 0 + 4r = 14 + -2 4r = 14 + -2 Combine like terms: 14 + -2 = 12 4r = 12 Divide each side by '4'. r = 3 Simplifying r = 3
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