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Simplifying -2r + -2(8 + -6r) = -86 -2r + (8 * -2 + -6r * -2) = -86 -2r + (-16 + 12r) = -86 Reorder the terms: -16 + -2r + 12r = -86 Combine like terms: -2r + 12r = 10r -16 + 10r = -86 Solving -16 + 10r = -86 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + 10r = -86 + 16 Combine like terms: -16 + 16 = 0 0 + 10r = -86 + 16 10r = -86 + 16 Combine like terms: -86 + 16 = -70 10r = -70 Divide each side by '10'. r = -7 Simplifying r = -7
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