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Simplifying 6r + -4 = 20 + -2r Reorder the terms: -4 + 6r = 20 + -2r Solving -4 + 6r = 20 + -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. -4 + 6r + 2r = 20 + -2r + 2r Combine like terms: 6r + 2r = 8r -4 + 8r = 20 + -2r + 2r Combine like terms: -2r + 2r = 0 -4 + 8r = 20 + 0 -4 + 8r = 20 Add '4' to each side of the equation. -4 + 4 + 8r = 20 + 4 Combine like terms: -4 + 4 = 0 0 + 8r = 20 + 4 8r = 20 + 4 Combine like terms: 20 + 4 = 24 8r = 24 Divide each side by '8'. r = 3 Simplifying r = 3
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