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Simplifying 3x2 + x + -1 + -1(3x2 + -7x + -1) = 0 Reorder the terms: 3x2 + x + -1 + -1(-1 + -7x + 3x2) = 0 3x2 + x + -1 + (-1 * -1 + -7x * -1 + 3x2 * -1) = 0 3x2 + x + -1 + (1 + 7x + -3x2) = 0 Reorder the terms: -1 + 1 + x + 7x + 3x2 + -3x2 = 0 Combine like terms: -1 + 1 = 0 0 + x + 7x + 3x2 + -3x2 = 0 x + 7x + 3x2 + -3x2 = 0 Combine like terms: x + 7x = 8x 8x + 3x2 + -3x2 = 0 Combine like terms: 3x2 + -3x2 = 0 8x + 0 = 0 8x = 0 Solving 8x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '8'. x = 0 Simplifying x = 0
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