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Simplifying 6r + -3 = 2r + 21 Reorder the terms: -3 + 6r = 2r + 21 Reorder the terms: -3 + 6r = 21 + 2r Solving -3 + 6r = 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. -3 + 6r + -2r = 21 + 2r + -2r Combine like terms: 6r + -2r = 4r -3 + 4r = 21 + 2r + -2r Combine like terms: 2r + -2r = 0 -3 + 4r = 21 + 0 -3 + 4r = 21 Add '3' to each side of the equation. -3 + 3 + 4r = 21 + 3 Combine like terms: -3 + 3 = 0 0 + 4r = 21 + 3 4r = 21 + 3 Combine like terms: 21 + 3 = 24 4r = 24 Divide each side by '4'. r = 6 Simplifying r = 6
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