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