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Simplifying 8r + -7 = -1 + 12 Reorder the terms: -7 + 8r = -1 + 12 Combine like terms: -1 + 12 = 11 -7 + 8r = 11 Solving -7 + 8r = 11 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 8r = 11 + 7 Combine like terms: -7 + 7 = 0 0 + 8r = 11 + 7 8r = 11 + 7 Combine like terms: 11 + 7 = 18 8r = 18 Divide each side by '8'. r = 2.25 Simplifying r = 2.25
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