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Simplifying 4 + 42x = 21x + 7 Reorder the terms: 4 + 42x = 7 + 21x Solving 4 + 42x = 7 + 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. 4 + 42x + -21x = 7 + 21x + -21x Combine like terms: 42x + -21x = 21x 4 + 21x = 7 + 21x + -21x Combine like terms: 21x + -21x = 0 4 + 21x = 7 + 0 4 + 21x = 7 Add '-4' to each side of the equation. 4 + -4 + 21x = 7 + -4 Combine like terms: 4 + -4 = 0 0 + 21x = 7 + -4 21x = 7 + -4 Combine like terms: 7 + -4 = 3 21x = 3 Divide each side by '21'. x = 0.1428571429 Simplifying x = 0.1428571429
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