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Simplifying y2 + -4x + 2y + 21 = 0 Reorder the terms: 21 + -4x + 2y + y2 = 0 Solving 21 + -4x + 2y + y2 = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -4x + 2y + -21 + y2 = 0 + -21 Reorder the terms: 21 + -21 + -4x + 2y + y2 = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -4x + 2y + y2 = 0 + -21 -4x + 2y + y2 = 0 + -21 Combine like terms: 0 + -21 = -21 -4x + 2y + y2 = -21 Add '-2y' to each side of the equation. -4x + 2y + -2y + y2 = -21 + -2y Combine like terms: 2y + -2y = 0 -4x + 0 + y2 = -21 + -2y -4x + y2 = -21 + -2y Add '-1y2' to each side of the equation. -4x + y2 + -1y2 = -21 + -2y + -1y2 Combine like terms: y2 + -1y2 = 0 -4x + 0 = -21 + -2y + -1y2 -4x = -21 + -2y + -1y2 Divide each side by '-4'. x = 5.25 + 0.5y + 0.25y2 Simplifying x = 5.25 + 0.5y + 0.25y2
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