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