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Simplifying x2 + 0.8x + c = 0 Reorder the terms: c + 0.8x + x2 = 0 Solving c + 0.8x + x2 = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-0.8x' to each side of the equation. c + 0.8x + -0.8x + x2 = 0 + -0.8x Combine like terms: 0.8x + -0.8x = 0.0 c + 0.0 + x2 = 0 + -0.8x c + x2 = 0 + -0.8x Remove the zero: c + x2 = -0.8x Add '-1x2' to each side of the equation. c + x2 + -1x2 = -0.8x + -1x2 Combine like terms: x2 + -1x2 = 0 c + 0 = -0.8x + -1x2 c = -0.8x + -1x2 Simplifying c = -0.8x + -1x2
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