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Simplifying 3r + -27 = -21 + 2r Reorder the terms: -27 + 3r = -21 + 2r Solving -27 + 3r = -21 + 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. -27 + 3r + -2r = -21 + 2r + -2r Combine like terms: 3r + -2r = 1r -27 + 1r = -21 + 2r + -2r Combine like terms: 2r + -2r = 0 -27 + 1r = -21 + 0 -27 + 1r = -21 Add '27' to each side of the equation. -27 + 27 + 1r = -21 + 27 Combine like terms: -27 + 27 = 0 0 + 1r = -21 + 27 1r = -21 + 27 Combine like terms: -21 + 27 = 6 1r = 6 Divide each side by '1'. r = 6 Simplifying r = 6
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