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Simplifying -8 + -4(r + -5) = 8 Reorder the terms: -8 + -4(-5 + r) = 8 -8 + (-5 * -4 + r * -4) = 8 -8 + (20 + -4r) = 8 Combine like terms: -8 + 20 = 12 12 + -4r = 8 Solving 12 + -4r = 8 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + -4r = 8 + -12 Combine like terms: 12 + -12 = 0 0 + -4r = 8 + -12 -4r = 8 + -12 Combine like terms: 8 + -12 = -4 -4r = -4 Divide each side by '-4'. r = 1 Simplifying r = 1
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