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Simplifying 7x + 7x + 1 + 7x + 2 = 57 Reorder the terms: 1 + 2 + 7x + 7x + 7x = 57 Combine like terms: 1 + 2 = 3 3 + 7x + 7x + 7x = 57 Combine like terms: 7x + 7x = 14x 3 + 14x + 7x = 57 Combine like terms: 14x + 7x = 21x 3 + 21x = 57 Solving 3 + 21x = 57 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 21x = 57 + -3 Combine like terms: 3 + -3 = 0 0 + 21x = 57 + -3 21x = 57 + -3 Combine like terms: 57 + -3 = 54 21x = 54 Divide each side by '21'. x = 2.571428571 Simplifying x = 2.571428571
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