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Simplifying -1(-4r + -8) = 2(r + 4) Reorder the terms: -1(-8 + -4r) = 2(r + 4) (-8 * -1 + -4r * -1) = 2(r + 4) (8 + 4r) = 2(r + 4) Reorder the terms: 8 + 4r = 2(4 + r) 8 + 4r = (4 * 2 + r * 2) 8 + 4r = (8 + 2r) Add '-8' to each side of the equation. 8 + -8 + 4r = 8 + -8 + 2r Combine like terms: 8 + -8 = 0 0 + 4r = 8 + -8 + 2r 4r = 8 + -8 + 2r Combine like terms: 8 + -8 = 0 4r = 0 + 2r 4r = 2r Solving 4r = 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. 4r + -2r = 2r + -2r Combine like terms: 4r + -2r = 2r 2r = 2r + -2r Combine like terms: 2r + -2r = 0 2r = 0 Divide each side by '2'. r = 0 Simplifying r = 0
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