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Simplifying r + -2 = -11 + 2r Reorder the terms: -2 + r = -11 + 2r Solving -2 + r = -11 + 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 = -11 + 2r + -2r Combine like terms: r + -2r = -1r -2 + -1r = -11 + 2r + -2r Combine like terms: 2r + -2r = 0 -2 + -1r = -11 + 0 -2 + -1r = -11 Add '2' to each side of the equation. -2 + 2 + -1r = -11 + 2 Combine like terms: -2 + 2 = 0 0 + -1r = -11 + 2 -1r = -11 + 2 Combine like terms: -11 + 2 = -9 -1r = -9 Divide each side by '-1'. r = 9 Simplifying r = 9
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