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Simplifying 81x2 + 72s + 16 = 0 Reorder the terms: 16 + 72s + 81x2 = 0 Solving 16 + 72s + 81x2 = 0 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-16' to each side of the equation. 16 + 72s + -16 + 81x2 = 0 + -16 Reorder the terms: 16 + -16 + 72s + 81x2 = 0 + -16 Combine like terms: 16 + -16 = 0 0 + 72s + 81x2 = 0 + -16 72s + 81x2 = 0 + -16 Combine like terms: 0 + -16 = -16 72s + 81x2 = -16 Add '-81x2' to each side of the equation. 72s + 81x2 + -81x2 = -16 + -81x2 Combine like terms: 81x2 + -81x2 = 0 72s + 0 = -16 + -81x2 72s = -16 + -81x2 Divide each side by '72'. s = -0.2222222222 + -1.125x2 Simplifying s = -0.2222222222 + -1.125x2
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