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Simplifying factorx2 + 3x + -21 = 0 Reorder the terms: -21 + acfortx2 + 3x = 0 Solving -21 + acfortx2 + 3x = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '21' to each side of the equation. -21 + acfortx2 + 21 + 3x = 0 + 21 Reorder the terms: -21 + 21 + acfortx2 + 3x = 0 + 21 Combine like terms: -21 + 21 = 0 0 + acfortx2 + 3x = 0 + 21 acfortx2 + 3x = 0 + 21 Combine like terms: 0 + 21 = 21 acfortx2 + 3x = 21 Add '-3x' to each side of the equation. acfortx2 + 3x + -3x = 21 + -3x Combine like terms: 3x + -3x = 0 acfortx2 + 0 = 21 + -3x acfortx2 = 21 + -3x Divide each side by 'cfortx2'. a = 21c-1f-1o-1r-1t-1x-2 + -3c-1f-1o-1r-1t-1x-1 Simplifying a = 21c-1f-1o-1r-1t-1x-2 + -3c-1f-1o-1r-1t-1x-1
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