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Simplifying 2r + -5s = -30 Solving 2r + -5s = -30 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '5s' to each side of the equation. 2r + -5s + 5s = -30 + 5s Combine like terms: -5s + 5s = 0 2r + 0 = -30 + 5s 2r = -30 + 5s Divide each side by '2'. r = -15 + 2.5s Simplifying r = -15 + 2.5s
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