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Simplifying E = (2x2 + -1x + 7) + -1(3x2 + -4x + 6) + (-1x2 + -7x + 9) Reorder the terms: E = (7 + -1x + 2x2) + -1(3x2 + -4x + 6) + (-1x2 + -7x + 9) Remove parenthesis around (7 + -1x + 2x2) E = 7 + -1x + 2x2 + -1(3x2 + -4x + 6) + (-1x2 + -7x + 9) Reorder the terms: E = 7 + -1x + 2x2 + -1(6 + -4x + 3x2) + (-1x2 + -7x + 9) E = 7 + -1x + 2x2 + (6 * -1 + -4x * -1 + 3x2 * -1) + (-1x2 + -7x + 9) E = 7 + -1x + 2x2 + (-6 + 4x + -3x2) + (-1x2 + -7x + 9) Reorder the terms: E = 7 + -1x + 2x2 + -6 + 4x + -3x2 + (9 + -7x + -1x2) Remove parenthesis around (9 + -7x + -1x2) E = 7 + -1x + 2x2 + -6 + 4x + -3x2 + 9 + -7x + -1x2 Reorder the terms: E = 7 + -6 + 9 + -1x + 4x + -7x + 2x2 + -3x2 + -1x2 Combine like terms: 7 + -6 = 1 E = 1 + 9 + -1x + 4x + -7x + 2x2 + -3x2 + -1x2 Combine like terms: 1 + 9 = 10 E = 10 + -1x + 4x + -7x + 2x2 + -3x2 + -1x2 Combine like terms: -1x + 4x = 3x E = 10 + 3x + -7x + 2x2 + -3x2 + -1x2 Combine like terms: 3x + -7x = -4x E = 10 + -4x + 2x2 + -3x2 + -1x2 Combine like terms: 2x2 + -3x2 = -1x2 E = 10 + -4x + -1x2 + -1x2 Combine like terms: -1x2 + -1x2 = -2x2 E = 10 + -4x + -2x2 Solving E = 10 + -4x + -2x2 Solving for variable 'E'. Move all terms containing E to the left, all other terms to the right. Simplifying E = 10 + -4x + -2x2
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