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Simplifying -1r + 8.5 = 142 Reorder the terms: 8.5 + -1r = 142 Solving 8.5 + -1r = 142 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-8.5' to each side of the equation. 8.5 + -8.5 + -1r = 142 + -8.5 Combine like terms: 8.5 + -8.5 = 0.0 0.0 + -1r = 142 + -8.5 -1r = 142 + -8.5 Combine like terms: 142 + -8.5 = 133.5 -1r = 133.5 Divide each side by '-1'. r = -133.5 Simplifying r = -133.5
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