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Simplifying 13r + 13s + 65 = 0 Reorder the terms: 65 + 13r + 13s = 0 Solving 65 + 13r + 13s = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-65' to each side of the equation. 65 + 13r + -65 + 13s = 0 + -65 Reorder the terms: 65 + -65 + 13r + 13s = 0 + -65 Combine like terms: 65 + -65 = 0 0 + 13r + 13s = 0 + -65 13r + 13s = 0 + -65 Combine like terms: 0 + -65 = -65 13r + 13s = -65 Add '-13s' to each side of the equation. 13r + 13s + -13s = -65 + -13s Combine like terms: 13s + -13s = 0 13r + 0 = -65 + -13s 13r = -65 + -13s Divide each side by '13'. r = -5 + -1s Simplifying r = -5 + -1s
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