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Simplifying -2 + -8(r + 8) = -122 Reorder the terms: -2 + -8(8 + r) = -122 -2 + (8 * -8 + r * -8) = -122 -2 + (-64 + -8r) = -122 Combine like terms: -2 + -64 = -66 -66 + -8r = -122 Solving -66 + -8r = -122 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '66' to each side of the equation. -66 + 66 + -8r = -122 + 66 Combine like terms: -66 + 66 = 0 0 + -8r = -122 + 66 -8r = -122 + 66 Combine like terms: -122 + 66 = -56 -8r = -56 Divide each side by '-8'. r = 7 Simplifying r = 7
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