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Simplifying -2r + 6 + 7 = 8 Reorder the terms: 6 + 7 + -2r = 8 Combine like terms: 6 + 7 = 13 13 + -2r = 8 Solving 13 + -2r = 8 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + -2r = 8 + -13 Combine like terms: 13 + -13 = 0 0 + -2r = 8 + -13 -2r = 8 + -13 Combine like terms: 8 + -13 = -5 -2r = -5 Divide each side by '-2'. r = 2.5 Simplifying r = 2.5
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