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Simplifying 2x + -1 + 9 = 21x Reorder the terms: -1 + 9 + 2x = 21x Combine like terms: -1 + 9 = 8 8 + 2x = 21x Solving 8 + 2x = 21x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21x' to each side of the equation. 8 + 2x + -21x = 21x + -21x Combine like terms: 2x + -21x = -19x 8 + -19x = 21x + -21x Combine like terms: 21x + -21x = 0 8 + -19x = 0 Add '-8' to each side of the equation. 8 + -8 + -19x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -19x = 0 + -8 -19x = 0 + -8 Combine like terms: 0 + -8 = -8 -19x = -8 Divide each side by '-19'. x = 0.4210526316 Simplifying x = 0.4210526316
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