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Simplifying -1y2 + 3x + -12y + -21 = 0 Reorder the terms: -21 + 3x + -12y + -1y2 = 0 Solving -21 + 3x + -12y + -1y2 = 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 + 3x + -12y + 21 + -1y2 = 0 + 21 Reorder the terms: -21 + 21 + 3x + -12y + -1y2 = 0 + 21 Combine like terms: -21 + 21 = 0 0 + 3x + -12y + -1y2 = 0 + 21 3x + -12y + -1y2 = 0 + 21 Combine like terms: 0 + 21 = 21 3x + -12y + -1y2 = 21 Add '12y' to each side of the equation. 3x + -12y + 12y + -1y2 = 21 + 12y Combine like terms: -12y + 12y = 0 3x + 0 + -1y2 = 21 + 12y 3x + -1y2 = 21 + 12y Add 'y2' to each side of the equation. 3x + -1y2 + y2 = 21 + 12y + y2 Combine like terms: -1y2 + y2 = 0 3x + 0 = 21 + 12y + y2 3x = 21 + 12y + y2 Divide each side by '3'. x = 7 + 4y + 0.3333333333y2 Simplifying x = 7 + 4y + 0.3333333333y2
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