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Simplifying 2r + -15 = 39 + 8r Reorder the terms: -15 + 2r = 39 + 8r Solving -15 + 2r = 39 + 8r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-8r' to each side of the equation. -15 + 2r + -8r = 39 + 8r + -8r Combine like terms: 2r + -8r = -6r -15 + -6r = 39 + 8r + -8r Combine like terms: 8r + -8r = 0 -15 + -6r = 39 + 0 -15 + -6r = 39 Add '15' to each side of the equation. -15 + 15 + -6r = 39 + 15 Combine like terms: -15 + 15 = 0 0 + -6r = 39 + 15 -6r = 39 + 15 Combine like terms: 39 + 15 = 54 -6r = 54 Divide each side by '-6'. r = -9 Simplifying r = -9
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