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Simplifying 9 + 2r = 16 Solving 9 + 2r = 16 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + 2r = 16 + -9 Combine like terms: 9 + -9 = 0 0 + 2r = 16 + -9 2r = 16 + -9 Combine like terms: 16 + -9 = 7 2r = 7 Divide each side by '2'. r = 3.5 Simplifying r = 3.5
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