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Simplifying 36 = 18 + 2r Solving 36 = 18 + 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. 36 + -2r = 18 + 2r + -2r Combine like terms: 2r + -2r = 0 36 + -2r = 18 + 0 36 + -2r = 18 Add '-36' to each side of the equation. 36 + -36 + -2r = 18 + -36 Combine like terms: 36 + -36 = 0 0 + -2r = 18 + -36 -2r = 18 + -36 Combine like terms: 18 + -36 = -18 -2r = -18 Divide each side by '-2'. r = 9 Simplifying r = 9
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