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Simplifying 2r + -15 = 15 + r Reorder the terms: -15 + 2r = 15 + r Solving -15 + 2r = 15 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. -15 + 2r + -1r = 15 + r + -1r Combine like terms: 2r + -1r = 1r -15 + 1r = 15 + r + -1r Combine like terms: r + -1r = 0 -15 + 1r = 15 + 0 -15 + 1r = 15 Add '15' to each side of the equation. -15 + 15 + 1r = 15 + 15 Combine like terms: -15 + 15 = 0 0 + 1r = 15 + 15 1r = 15 + 15 Combine like terms: 15 + 15 = 30 1r = 30 Divide each side by '1'. r = 30 Simplifying r = 30
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