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Simplifying -8(r + -2) = 40 Reorder the terms: -8(-2 + r) = 40 (-2 * -8 + r * -8) = 40 (16 + -8r) = 40 Solving 16 + -8r = 40 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 + -8r = 40 + -16 Combine like terms: 16 + -16 = 0 0 + -8r = 40 + -16 -8r = 40 + -16 Combine like terms: 40 + -16 = 24 -8r = 24 Divide each side by '-8'. r = -3 Simplifying r = -3
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