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Simplifying 18 = -2r + -8 Reorder the terms: 18 = -8 + -2r Solving 18 = -8 + -2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '2r' to each side of the equation. 18 + 2r = -8 + -2r + 2r Combine like terms: -2r + 2r = 0 18 + 2r = -8 + 0 18 + 2r = -8 Add '-18' to each side of the equation. 18 + -18 + 2r = -8 + -18 Combine like terms: 18 + -18 = 0 0 + 2r = -8 + -18 2r = -8 + -18 Combine like terms: -8 + -18 = -26 2r = -26 Divide each side by '2'. r = -13 Simplifying r = -13
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