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Simplifying 9 + 2r = 16 + -1r Solving 9 + 2r = 16 + -1r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add 'r' to each side of the equation. 9 + 2r + r = 16 + -1r + r Combine like terms: 2r + r = 3r 9 + 3r = 16 + -1r + r Combine like terms: -1r + r = 0 9 + 3r = 16 + 0 9 + 3r = 16 Add '-9' to each side of the equation. 9 + -9 + 3r = 16 + -9 Combine like terms: 9 + -9 = 0 0 + 3r = 16 + -9 3r = 16 + -9 Combine like terms: 16 + -9 = 7 3r = 7 Divide each side by '3'. r = 2.333333333 Simplifying r = 2.333333333
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