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Simplifying -1r + -1(-1) = o Multiply -1 * -1 -1r + 1 = o Reorder the terms: 1 + -1r = o Solving 1 + -1r = o Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -1r = -1 + o Combine like terms: 1 + -1 = 0 0 + -1r = -1 + o -1r = -1 + o Divide each side by '-1'. r = 1 + -1o Simplifying r = 1 + -1o
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