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Simplifying x + x2 + 7x + 7x + 49 + -1x2 + 9x + 9x + 81 = 0 Reorder the terms: 49 + 81 + x + 7x + 7x + 9x + 9x + x2 + -1x2 = 0 Combine like terms: 49 + 81 = 130 130 + x + 7x + 7x + 9x + 9x + x2 + -1x2 = 0 Combine like terms: x + 7x = 8x 130 + 8x + 7x + 9x + 9x + x2 + -1x2 = 0 Combine like terms: 8x + 7x = 15x 130 + 15x + 9x + 9x + x2 + -1x2 = 0 Combine like terms: 15x + 9x = 24x 130 + 24x + 9x + x2 + -1x2 = 0 Combine like terms: 24x + 9x = 33x 130 + 33x + x2 + -1x2 = 0 Combine like terms: x2 + -1x2 = 0 130 + 33x + 0 = 0 130 + 33x = 0 Solving 130 + 33x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-130' to each side of the equation. 130 + -130 + 33x = 0 + -130 Combine like terms: 130 + -130 = 0 0 + 33x = 0 + -130 33x = 0 + -130 Combine like terms: 0 + -130 = -130 33x = -130 Divide each side by '33'. x = -3.939393939 Simplifying x = -3.939393939
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