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Simplifying -1r + -6r + 2 = 86 Reorder the terms: 2 + -1r + -6r = 86 Combine like terms: -1r + -6r = -7r 2 + -7r = 86 Solving 2 + -7r = 86 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -7r = 86 + -2 Combine like terms: 2 + -2 = 0 0 + -7r = 86 + -2 -7r = 86 + -2 Combine like terms: 86 + -2 = 84 -7r = 84 Divide each side by '-7'. r = -12 Simplifying r = -12
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