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Simplifying -2 + r = 2r + 4 Reorder the terms: -2 + r = 4 + 2r Solving -2 + r = 4 + 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. -2 + r + -2r = 4 + 2r + -2r Combine like terms: r + -2r = -1r -2 + -1r = 4 + 2r + -2r Combine like terms: 2r + -2r = 0 -2 + -1r = 4 + 0 -2 + -1r = 4 Add '2' to each side of the equation. -2 + 2 + -1r = 4 + 2 Combine like terms: -2 + 2 = 0 0 + -1r = 4 + 2 -1r = 4 + 2 Combine like terms: 4 + 2 = 6 -1r = 6 Divide each side by '-1'. r = -6 Simplifying r = -6
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