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