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Simplifying x2 + -7X + 28 = 0 Reorder the terms: 28 + -7X + x2 = 0 Solving 28 + -7X + x2 = 0 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-28' to each side of the equation. 28 + -7X + -28 + x2 = 0 + -28 Reorder the terms: 28 + -28 + -7X + x2 = 0 + -28 Combine like terms: 28 + -28 = 0 0 + -7X + x2 = 0 + -28 -7X + x2 = 0 + -28 Combine like terms: 0 + -28 = -28 -7X + x2 = -28 Add '-1x2' to each side of the equation. -7X + x2 + -1x2 = -28 + -1x2 Combine like terms: x2 + -1x2 = 0 -7X + 0 = -28 + -1x2 -7X = -28 + -1x2 Divide each side by '-7'. X = 4 + 0.1428571429x2 Simplifying X = 4 + 0.1428571429x2
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