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Simplifying 15 = 2r + 11 Reorder the terms: 15 = 11 + 2r Solving 15 = 11 + 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. 15 + -2r = 11 + 2r + -2r Combine like terms: 2r + -2r = 0 15 + -2r = 11 + 0 15 + -2r = 11 Add '-15' to each side of the equation. 15 + -15 + -2r = 11 + -15 Combine like terms: 15 + -15 = 0 0 + -2r = 11 + -15 -2r = 11 + -15 Combine like terms: 11 + -15 = -4 -2r = -4 Divide each side by '-2'. r = 2 Simplifying r = 2
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