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Simplifying 9 + 2r + -8 = 7r + 3 + -3r Reorder the terms: 9 + -8 + 2r = 7r + 3 + -3r Combine like terms: 9 + -8 = 1 1 + 2r = 7r + 3 + -3r Reorder the terms: 1 + 2r = 3 + 7r + -3r Combine like terms: 7r + -3r = 4r 1 + 2r = 3 + 4r Solving 1 + 2r = 3 + 4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4r' to each side of the equation. 1 + 2r + -4r = 3 + 4r + -4r Combine like terms: 2r + -4r = -2r 1 + -2r = 3 + 4r + -4r Combine like terms: 4r + -4r = 0 1 + -2r = 3 + 0 1 + -2r = 3 Add '-1' to each side of the equation. 1 + -1 + -2r = 3 + -1 Combine like terms: 1 + -1 = 0 0 + -2r = 3 + -1 -2r = 3 + -1 Combine like terms: 3 + -1 = 2 -2r = 2 Divide each side by '-2'. r = -1 Simplifying r = -1
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