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Simplifying 1 + 2r + -1r = 11 + 3r Combine like terms: 2r + -1r = 1r 1 + 1r = 11 + 3r Solving 1 + 1r = 11 + 3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3r' to each side of the equation. 1 + 1r + -3r = 11 + 3r + -3r Combine like terms: 1r + -3r = -2r 1 + -2r = 11 + 3r + -3r Combine like terms: 3r + -3r = 0 1 + -2r = 11 + 0 1 + -2r = 11 Add '-1' to each side of the equation. 1 + -1 + -2r = 11 + -1 Combine like terms: 1 + -1 = 0 0 + -2r = 11 + -1 -2r = 11 + -1 Combine like terms: 11 + -1 = 10 -2r = 10 Divide each side by '-2'. r = -5 Simplifying r = -5
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