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Simplifying 15r + -15 = 8r + -1 Reorder the terms: -15 + 15r = 8r + -1 Reorder the terms: -15 + 15r = -1 + 8r Solving -15 + 15r = -1 + 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 + 15r + -8r = -1 + 8r + -8r Combine like terms: 15r + -8r = 7r -15 + 7r = -1 + 8r + -8r Combine like terms: 8r + -8r = 0 -15 + 7r = -1 + 0 -15 + 7r = -1 Add '15' to each side of the equation. -15 + 15 + 7r = -1 + 15 Combine like terms: -15 + 15 = 0 0 + 7r = -1 + 15 7r = -1 + 15 Combine like terms: -1 + 15 = 14 7r = 14 Divide each side by '7'. r = 2 Simplifying r = 2
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