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Simplifying 4r + -2r + -2 = 8 Reorder the terms: -2 + 4r + -2r = 8 Combine like terms: 4r + -2r = 2r -2 + 2r = 8 Solving -2 + 2r = 8 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + 2r = 8 + 2 Combine like terms: -2 + 2 = 0 0 + 2r = 8 + 2 2r = 8 + 2 Combine like terms: 8 + 2 = 10 2r = 10 Divide each side by '2'. r = 5 Simplifying r = 5
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