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Simplifying -2 = -4r + -2(-4r + 2) Reorder the terms: -2 = -4r + -2(2 + -4r) -2 = -4r + (2 * -2 + -4r * -2) -2 = -4r + (-4 + 8r) Reorder the terms: -2 = -4 + -4r + 8r Combine like terms: -4r + 8r = 4r -2 = -4 + 4r Solving -2 = -4 + 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. -2 + -4r = -4 + 4r + -4r Combine like terms: 4r + -4r = 0 -2 + -4r = -4 + 0 -2 + -4r = -4 Add '2' to each side of the equation. -2 + 2 + -4r = -4 + 2 Combine like terms: -2 + 2 = 0 0 + -4r = -4 + 2 -4r = -4 + 2 Combine like terms: -4 + 2 = -2 -4r = -2 Divide each side by '-4'. r = 0.5 Simplifying r = 0.5
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