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Simplifying 8 + 18r + -1 = 5r + 67 + -2r Reorder the terms: 8 + -1 + 18r = 5r + 67 + -2r Combine like terms: 8 + -1 = 7 7 + 18r = 5r + 67 + -2r Reorder the terms: 7 + 18r = 67 + 5r + -2r Combine like terms: 5r + -2r = 3r 7 + 18r = 67 + 3r Solving 7 + 18r = 67 + 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. 7 + 18r + -3r = 67 + 3r + -3r Combine like terms: 18r + -3r = 15r 7 + 15r = 67 + 3r + -3r Combine like terms: 3r + -3r = 0 7 + 15r = 67 + 0 7 + 15r = 67 Add '-7' to each side of the equation. 7 + -7 + 15r = 67 + -7 Combine like terms: 7 + -7 = 0 0 + 15r = 67 + -7 15r = 67 + -7 Combine like terms: 67 + -7 = 60 15r = 60 Divide each side by '15'. r = 4 Simplifying r = 4
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