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Simplifying 1r + 11 + -3r = 15 + 2r Reorder the terms: 11 + 1r + -3r = 15 + 2r Combine like terms: 1r + -3r = -2r 11 + -2r = 15 + 2r Solving 11 + -2r = 15 + 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. 11 + -2r + -2r = 15 + 2r + -2r Combine like terms: -2r + -2r = -4r 11 + -4r = 15 + 2r + -2r Combine like terms: 2r + -2r = 0 11 + -4r = 15 + 0 11 + -4r = 15 Add '-11' to each side of the equation. 11 + -11 + -4r = 15 + -11 Combine like terms: 11 + -11 = 0 0 + -4r = 15 + -11 -4r = 15 + -11 Combine like terms: 15 + -11 = 4 -4r = 4 Divide each side by '-4'. r = -1 Simplifying r = -1
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