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Simplifying 28 + 28x = 42 + 21x Solving 28 + 28x = 42 + 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. 28 + 28x + -21x = 42 + 21x + -21x Combine like terms: 28x + -21x = 7x 28 + 7x = 42 + 21x + -21x Combine like terms: 21x + -21x = 0 28 + 7x = 42 + 0 28 + 7x = 42 Add '-28' to each side of the equation. 28 + -28 + 7x = 42 + -28 Combine like terms: 28 + -28 = 0 0 + 7x = 42 + -28 7x = 42 + -28 Combine like terms: 42 + -28 = 14 7x = 14 Divide each side by '7'. x = 2 Simplifying x = 2
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