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Simplifying 4x2 + -8 + -4x2 + 9 = 3x2 + -9X + -18 Reorder the terms: -8 + 9 + 4x2 + -4x2 = 3x2 + -9X + -18 Combine like terms: -8 + 9 = 1 1 + 4x2 + -4x2 = 3x2 + -9X + -18 Combine like terms: 4x2 + -4x2 = 0 1 + 0 = 3x2 + -9X + -18 1 = 3x2 + -9X + -18 Reorder the terms: 1 = -18 + -9X + 3x2 Solving 1 = -18 + -9X + 3x2 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '9X' to each side of the equation. 1 + 9X = -18 + -9X + 9X + 3x2 Combine like terms: -9X + 9X = 0 1 + 9X = -18 + 0 + 3x2 1 + 9X = -18 + 3x2 Add '-1' to each side of the equation. 1 + -1 + 9X = -18 + -1 + 3x2 Combine like terms: 1 + -1 = 0 0 + 9X = -18 + -1 + 3x2 9X = -18 + -1 + 3x2 Combine like terms: -18 + -1 = -19 9X = -19 + 3x2 Divide each side by '9'. X = -2.111111111 + 0.3333333333x2 Simplifying X = -2.111111111 + 0.3333333333x2
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