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Simplifying 72r + -84s + -108 = 0 Reorder the terms: -108 + 72r + -84s = 0 Solving -108 + 72r + -84s = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '108' to each side of the equation. -108 + 72r + 108 + -84s = 0 + 108 Reorder the terms: -108 + 108 + 72r + -84s = 0 + 108 Combine like terms: -108 + 108 = 0 0 + 72r + -84s = 0 + 108 72r + -84s = 0 + 108 Combine like terms: 0 + 108 = 108 72r + -84s = 108 Add '84s' to each side of the equation. 72r + -84s + 84s = 108 + 84s Combine like terms: -84s + 84s = 0 72r + 0 = 108 + 84s 72r = 108 + 84s Divide each side by '72'. r = 1.5 + 1.166666667s Simplifying r = 1.5 + 1.166666667s
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