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Simplifying 21(2 + -1x) + 11 = 8 (2 * 21 + -1x * 21) + 11 = 8 (42 + -21x) + 11 = 8 Reorder the terms: 42 + 11 + -21x = 8 Combine like terms: 42 + 11 = 53 53 + -21x = 8 Solving 53 + -21x = 8 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-53' to each side of the equation. 53 + -53 + -21x = 8 + -53 Combine like terms: 53 + -53 = 0 0 + -21x = 8 + -53 -21x = 8 + -53 Combine like terms: 8 + -53 = -45 -21x = -45 Divide each side by '-21'. x = 2.142857143 Simplifying x = 2.142857143
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