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Simplifying -1(4 + -2r) = -16 + 4r (4 * -1 + -2r * -1) = -16 + 4r (-4 + 2r) = -16 + 4r Solving -4 + 2r = -16 + 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. -4 + 2r + -4r = -16 + 4r + -4r Combine like terms: 2r + -4r = -2r -4 + -2r = -16 + 4r + -4r Combine like terms: 4r + -4r = 0 -4 + -2r = -16 + 0 -4 + -2r = -16 Add '4' to each side of the equation. -4 + 4 + -2r = -16 + 4 Combine like terms: -4 + 4 = 0 0 + -2r = -16 + 4 -2r = -16 + 4 Combine like terms: -16 + 4 = -12 -2r = -12 Divide each side by '-2'. r = 6 Simplifying r = 6
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