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