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Simplifying 16r2 + 72s + 81 = 0 Reorder the terms: 81 + 16r2 + 72s = 0 Solving 81 + 16r2 + 72s = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-81' to each side of the equation. 81 + 16r2 + -81 + 72s = 0 + -81 Reorder the terms: 81 + -81 + 16r2 + 72s = 0 + -81 Combine like terms: 81 + -81 = 0 0 + 16r2 + 72s = 0 + -81 16r2 + 72s = 0 + -81 Combine like terms: 0 + -81 = -81 16r2 + 72s = -81 Add '-72s' to each side of the equation. 16r2 + 72s + -72s = -81 + -72s Combine like terms: 72s + -72s = 0 16r2 + 0 = -81 + -72s 16r2 = -81 + -72s Divide each side by '16'. r2 = -5.0625 + -4.5s Simplifying r2 = -5.0625 + -4.5s Reorder the terms: 5.0625 + r2 + 4.5s = -5.0625 + -4.5s + 5.0625 + 4.5s Reorder the terms: 5.0625 + r2 + 4.5s = -5.0625 + 5.0625 + -4.5s + 4.5s Combine like terms: -5.0625 + 5.0625 = 0.0000 5.0625 + r2 + 4.5s = 0.0000 + -4.5s + 4.5s 5.0625 + r2 + 4.5s = -4.5s + 4.5s Combine like terms: -4.5s + 4.5s = 0.0 5.0625 + r2 + 4.5s = 0.0 The solution to this equation could not be determined.
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