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Simplifying x + 20 + 2x = 56 Reorder the terms: 20 + x + 2x = 56 Combine like terms: x + 2x = 3x 20 + 3x = 56 Solving 20 + 3x = 56 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + 3x = 56 + -20 Combine like terms: 20 + -20 = 0 0 + 3x = 56 + -20 3x = 56 + -20 Combine like terms: 56 + -20 = 36 3x = 36 Divide each side by '3'. x = 12 Simplifying x = 12
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