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Simplifying 8r + 1 = -7 Reorder the terms: 1 + 8r = -7 Solving 1 + 8r = -7 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 8r = -7 + -1 Combine like terms: 1 + -1 = 0 0 + 8r = -7 + -1 8r = -7 + -1 Combine like terms: -7 + -1 = -8 8r = -8 Divide each side by '8'. r = -1 Simplifying r = -1
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