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Simplifying x2 + 1.5X + 390 = 0 Reorder the terms: 390 + 1.5X + x2 = 0 Solving 390 + 1.5X + x2 = 0 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-390' to each side of the equation. 390 + 1.5X + -390 + x2 = 0 + -390 Reorder the terms: 390 + -390 + 1.5X + x2 = 0 + -390 Combine like terms: 390 + -390 = 0 0 + 1.5X + x2 = 0 + -390 1.5X + x2 = 0 + -390 Combine like terms: 0 + -390 = -390 1.5X + x2 = -390 Add '-1x2' to each side of the equation. 1.5X + x2 + -1x2 = -390 + -1x2 Combine like terms: x2 + -1x2 = 0 1.5X + 0 = -390 + -1x2 1.5X = -390 + -1x2 Divide each side by '1.5'. X = -260 + -0.6666666667x2 Simplifying X = -260 + -0.6666666667x2
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