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Simplifying -5 = -2 + -2r + -5 Reorder the terms: -5 = -2 + -5 + -2r Combine like terms: -2 + -5 = -7 -5 = -7 + -2r Solving -5 = -7 + -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. -5 + 2r = -7 + -2r + 2r Combine like terms: -2r + 2r = 0 -5 + 2r = -7 + 0 -5 + 2r = -7 Add '5' to each side of the equation. -5 + 5 + 2r = -7 + 5 Combine like terms: -5 + 5 = 0 0 + 2r = -7 + 5 2r = -7 + 5 Combine like terms: -7 + 5 = -2 2r = -2 Divide each side by '2'. r = -1 Simplifying r = -1
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