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Simplifying -6(r + 6) + -4 = -86 Reorder the terms: -6(6 + r) + -4 = -86 (6 * -6 + r * -6) + -4 = -86 (-36 + -6r) + -4 = -86 Reorder the terms: -36 + -4 + -6r = -86 Combine like terms: -36 + -4 = -40 -40 + -6r = -86 Solving -40 + -6r = -86 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '40' to each side of the equation. -40 + 40 + -6r = -86 + 40 Combine like terms: -40 + 40 = 0 0 + -6r = -86 + 40 -6r = -86 + 40 Combine like terms: -86 + 40 = -46 -6r = -46 Divide each side by '-6'. r = 7.666666667 Simplifying r = 7.666666667
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