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Simplifying -21x + -20 = 21x + 8 Reorder the terms: -20 + -21x = 21x + 8 Reorder the terms: -20 + -21x = 8 + 21x Solving -20 + -21x = 8 + 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. -20 + -21x + -21x = 8 + 21x + -21x Combine like terms: -21x + -21x = -42x -20 + -42x = 8 + 21x + -21x Combine like terms: 21x + -21x = 0 -20 + -42x = 8 + 0 -20 + -42x = 8 Add '20' to each side of the equation. -20 + 20 + -42x = 8 + 20 Combine like terms: -20 + 20 = 0 0 + -42x = 8 + 20 -42x = 8 + 20 Combine like terms: 8 + 20 = 28 -42x = 28 Divide each side by '-42'. x = -0.6666666667 Simplifying x = -0.6666666667
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