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Simplifying 2 + -1r + 7 = 61 Reorder the terms: 2 + 7 + -1r = 61 Combine like terms: 2 + 7 = 9 9 + -1r = 61 Solving 9 + -1r = 61 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 + -1r = 61 + -9 Combine like terms: 9 + -9 = 0 0 + -1r = 61 + -9 -1r = 61 + -9 Combine like terms: 61 + -9 = 52 -1r = 52 Divide each side by '-1'. r = -52 Simplifying r = -52
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