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Simplifying -13 = -6r + -1 Reorder the terms: -13 = -1 + -6r Solving -13 = -1 + -6r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '6r' to each side of the equation. -13 + 6r = -1 + -6r + 6r Combine like terms: -6r + 6r = 0 -13 + 6r = -1 + 0 -13 + 6r = -1 Add '13' to each side of the equation. -13 + 13 + 6r = -1 + 13 Combine like terms: -13 + 13 = 0 0 + 6r = -1 + 13 6r = -1 + 13 Combine like terms: -1 + 13 = 12 6r = 12 Divide each side by '6'. r = 2 Simplifying r = 2
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