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Simplifying Y4 + -4y2 + -21 = 0 Reorder the terms: -21 + Y4 + -4y2 = 0 Solving -21 + Y4 + -4y2 = 0 Solving for variable 'Y'. Move all terms containing Y to the left, all other terms to the right. Add '21' to each side of the equation. -21 + Y4 + 21 + -4y2 = 0 + 21 Reorder the terms: -21 + 21 + Y4 + -4y2 = 0 + 21 Combine like terms: -21 + 21 = 0 0 + Y4 + -4y2 = 0 + 21 Y4 + -4y2 = 0 + 21 Combine like terms: 0 + 21 = 21 Y4 + -4y2 = 21 Add '4y2' to each side of the equation. Y4 + -4y2 + 4y2 = 21 + 4y2 Combine like terms: -4y2 + 4y2 = 0 Y4 + 0 = 21 + 4y2 Y4 = 21 + 4y2 Simplifying Y4 = 21 + 4y2 Reorder the terms: -21 + Y4 + -4y2 = 21 + 4y2 + -21 + -4y2 Reorder the terms: -21 + Y4 + -4y2 = 21 + -21 + 4y2 + -4y2 Combine like terms: 21 + -21 = 0 -21 + Y4 + -4y2 = 0 + 4y2 + -4y2 -21 + Y4 + -4y2 = 4y2 + -4y2 Combine like terms: 4y2 + -4y2 = 0 -21 + Y4 + -4y2 = 0 The solution to this equation could not be determined.
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