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Simplifying 18r + 19 = -1r + -20 + -18 Reorder the terms: 19 + 18r = -1r + -20 + -18 Reorder the terms: 19 + 18r = -20 + -18 + -1r Combine like terms: -20 + -18 = -38 19 + 18r = -38 + -1r Solving 19 + 18r = -38 + -1r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add 'r' to each side of the equation. 19 + 18r + r = -38 + -1r + r Combine like terms: 18r + r = 19r 19 + 19r = -38 + -1r + r Combine like terms: -1r + r = 0 19 + 19r = -38 + 0 19 + 19r = -38 Add '-19' to each side of the equation. 19 + -19 + 19r = -38 + -19 Combine like terms: 19 + -19 = 0 0 + 19r = -38 + -19 19r = -38 + -19 Combine like terms: -38 + -19 = -57 19r = -57 Divide each side by '19'. r = -3 Simplifying r = -3
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