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Simplifying (r + -2) = 0 Reorder the terms: (-2 + r) = 0 Remove parenthesis around (-2 + r) -2 + r = 0 Solving -2 + r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + r = 0 + 2 Combine like terms: -2 + 2 = 0 0 + r = 0 + 2 r = 0 + 2 Combine like terms: 0 + 2 = 2 r = 2 Simplifying r = 2
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