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