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Simplifying 21 = -8x + 2x + 1 Reorder the terms: 21 = 1 + -8x + 2x Combine like terms: -8x + 2x = -6x 21 = 1 + -6x Solving 21 = 1 + -6x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6x' to each side of the equation. 21 + 6x = 1 + -6x + 6x Combine like terms: -6x + 6x = 0 21 + 6x = 1 + 0 21 + 6x = 1 Add '-21' to each side of the equation. 21 + -21 + 6x = 1 + -21 Combine like terms: 21 + -21 = 0 0 + 6x = 1 + -21 6x = 1 + -21 Combine like terms: 1 + -21 = -20 6x = -20 Divide each side by '6'. x = -3.333333333 Simplifying x = -3.333333333
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