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Simplifying (x + 4 + -3x2) + (7x + 3x2 + -5) = 0 Reorder the terms: (4 + x + -3x2) + (7x + 3x2 + -5) = 0 Remove parenthesis around (4 + x + -3x2) 4 + x + -3x2 + (7x + 3x2 + -5) = 0 Reorder the terms: 4 + x + -3x2 + (-5 + 7x + 3x2) = 0 Remove parenthesis around (-5 + 7x + 3x2) 4 + x + -3x2 + -5 + 7x + 3x2 = 0 Reorder the terms: 4 + -5 + x + 7x + -3x2 + 3x2 = 0 Combine like terms: 4 + -5 = -1 -1 + x + 7x + -3x2 + 3x2 = 0 Combine like terms: x + 7x = 8x -1 + 8x + -3x2 + 3x2 = 0 Combine like terms: -3x2 + 3x2 = 0 -1 + 8x + 0 = 0 -1 + 8x = 0 Solving -1 + 8x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + 8x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 8x = 0 + 1 8x = 0 + 1 Combine like terms: 0 + 1 = 1 8x = 1 Divide each side by '8'. x = 0.125 Simplifying x = 0.125
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