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Simplifying 9r + -16 = 72 + 2r Reorder the terms: -16 + 9r = 72 + 2r Solving -16 + 9r = 72 + 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. -16 + 9r + -2r = 72 + 2r + -2r Combine like terms: 9r + -2r = 7r -16 + 7r = 72 + 2r + -2r Combine like terms: 2r + -2r = 0 -16 + 7r = 72 + 0 -16 + 7r = 72 Add '16' to each side of the equation. -16 + 16 + 7r = 72 + 16 Combine like terms: -16 + 16 = 0 0 + 7r = 72 + 16 7r = 72 + 16 Combine like terms: 72 + 16 = 88 7r = 88 Divide each side by '7'. r = 12.57142857 Simplifying r = 12.57142857
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