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