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Simplifying 3r + 24 = -18 + -18r Reorder the terms: 24 + 3r = -18 + -18r Solving 24 + 3r = -18 + -18r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '18r' to each side of the equation. 24 + 3r + 18r = -18 + -18r + 18r Combine like terms: 3r + 18r = 21r 24 + 21r = -18 + -18r + 18r Combine like terms: -18r + 18r = 0 24 + 21r = -18 + 0 24 + 21r = -18 Add '-24' to each side of the equation. 24 + -24 + 21r = -18 + -24 Combine like terms: 24 + -24 = 0 0 + 21r = -18 + -24 21r = -18 + -24 Combine like terms: -18 + -24 = -42 21r = -42 Divide each side by '21'. r = -2 Simplifying r = -2
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