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Simplifying 2x + 4x + 21 = 56 Reorder the terms: 21 + 2x + 4x = 56 Combine like terms: 2x + 4x = 6x 21 + 6x = 56 Solving 21 + 6x = 56 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + 6x = 56 + -21 Combine like terms: 21 + -21 = 0 0 + 6x = 56 + -21 6x = 56 + -21 Combine like terms: 56 + -21 = 35 6x = 35 Divide each side by '6'. x = 5.833333333 Simplifying x = 5.833333333
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