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Simplifying 2r + -15 = -15 + 8r Reorder the terms: -15 + 2r = -15 + 8r Add '15' to each side of the equation. -15 + 15 + 2r = -15 + 15 + 8r Combine like terms: -15 + 15 = 0 0 + 2r = -15 + 15 + 8r 2r = -15 + 15 + 8r Combine like terms: -15 + 15 = 0 2r = 0 + 8r 2r = 8r Solving 2r = 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. 2r + -8r = 8r + -8r Combine like terms: 2r + -8r = -6r -6r = 8r + -8r Combine like terms: 8r + -8r = 0 -6r = 0 Divide each side by '-6'. r = 0 Simplifying r = 0
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