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Simplifying x2 + -4r + 4 = 0 Reorder the terms: 4 + -4r + x2 = 0 Solving 4 + -4r + x2 = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4r + -4 + x2 = 0 + -4 Reorder the terms: 4 + -4 + -4r + x2 = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -4r + x2 = 0 + -4 -4r + x2 = 0 + -4 Combine like terms: 0 + -4 = -4 -4r + x2 = -4 Add '-1x2' to each side of the equation. -4r + x2 + -1x2 = -4 + -1x2 Combine like terms: x2 + -1x2 = 0 -4r + 0 = -4 + -1x2 -4r = -4 + -1x2 Divide each side by '-4'. r = 1 + 0.25x2 Simplifying r = 1 + 0.25x2
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