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Simplifying -13 = -7r + -3 + 2r Reorder the terms: -13 = -3 + -7r + 2r Combine like terms: -7r + 2r = -5r -13 = -3 + -5r Solving -13 = -3 + -5r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '5r' to each side of the equation. -13 + 5r = -3 + -5r + 5r Combine like terms: -5r + 5r = 0 -13 + 5r = -3 + 0 -13 + 5r = -3 Add '13' to each side of the equation. -13 + 13 + 5r = -3 + 13 Combine like terms: -13 + 13 = 0 0 + 5r = -3 + 13 5r = -3 + 13 Combine like terms: -3 + 13 = 10 5r = 10 Divide each side by '5'. r = 2 Simplifying r = 2
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