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Simplifying -1 = -6r + -7 Reorder the terms: -1 = -7 + -6r Solving -1 = -7 + -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. -1 + 6r = -7 + -6r + 6r Combine like terms: -6r + 6r = 0 -1 + 6r = -7 + 0 -1 + 6r = -7 Add '1' to each side of the equation. -1 + 1 + 6r = -7 + 1 Combine like terms: -1 + 1 = 0 0 + 6r = -7 + 1 6r = -7 + 1 Combine like terms: -7 + 1 = -6 6r = -6 Divide each side by '6'. r = -1 Simplifying r = -1
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