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Simplifying (1 + -3(x + -7) + 8x) = 0 Reorder the terms: (1 + -3(-7 + x) + 8x) = 0 (1 + (-7 * -3 + x * -3) + 8x) = 0 (1 + (21 + -3x) + 8x) = 0 Combine like terms: 1 + 21 = 22 (22 + -3x + 8x) = 0 Combine like terms: -3x + 8x = 5x (22 + 5x) = 0 Remove parenthesis around (22 + 5x) 22 + 5x = 0 Solving 22 + 5x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-22' to each side of the equation. 22 + -22 + 5x = 0 + -22 Combine like terms: 22 + -22 = 0 0 + 5x = 0 + -22 5x = 0 + -22 Combine like terms: 0 + -22 = -22 5x = -22 Divide each side by '5'. x = -4.4 Simplifying x = -4.4
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