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Simplifying 2x + 2x + 2 = 21 Reorder the terms: 2 + 2x + 2x = 21 Combine like terms: 2x + 2x = 4x 2 + 4x = 21 Solving 2 + 4x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 4x = 21 + -2 Combine like terms: 2 + -2 = 0 0 + 4x = 21 + -2 4x = 21 + -2 Combine like terms: 21 + -2 = 19 4x = 19 Divide each side by '4'. x = 4.75 Simplifying x = 4.75
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