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Simplifying 8 = -1(2r + -4) Reorder the terms: 8 = -1(-4 + 2r) 8 = (-4 * -1 + 2r * -1) 8 = (4 + -2r) Solving 8 = 4 + -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. 8 + 2r = 4 + -2r + 2r Combine like terms: -2r + 2r = 0 8 + 2r = 4 + 0 8 + 2r = 4 Add '-8' to each side of the equation. 8 + -8 + 2r = 4 + -8 Combine like terms: 8 + -8 = 0 0 + 2r = 4 + -8 2r = 4 + -8 Combine like terms: 4 + -8 = -4 2r = -4 Divide each side by '2'. r = -2 Simplifying r = -2
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