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Simplifying 2r + 18 = 100 + -18 Reorder the terms: 18 + 2r = 100 + -18 Combine like terms: 100 + -18 = 82 18 + 2r = 82 Solving 18 + 2r = 82 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + 2r = 82 + -18 Combine like terms: 18 + -18 = 0 0 + 2r = 82 + -18 2r = 82 + -18 Combine like terms: 82 + -18 = 64 2r = 64 Divide each side by '2'. r = 32 Simplifying r = 32
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