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Simplifying -2r + 4 + 7 = 9 Reorder the terms: 4 + 7 + -2r = 9 Combine like terms: 4 + 7 = 11 11 + -2r = 9 Solving 11 + -2r = 9 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 + -2r = 9 + -11 Combine like terms: 11 + -11 = 0 0 + -2r = 9 + -11 -2r = 9 + -11 Combine like terms: 9 + -11 = -2 -2r = -2 Divide each side by '-2'. r = 1 Simplifying r = 1
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