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Simplifying 8 + -1r = 17 Solving 8 + -1r = 17 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1r = 17 + -8 Combine like terms: 8 + -8 = 0 0 + -1r = 17 + -8 -1r = 17 + -8 Combine like terms: 17 + -8 = 9 -1r = 9 Divide each side by '-1'. r = -9 Simplifying r = -9
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