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Simplifying x + x + 2 = 138 Reorder the terms: 2 + x + x = 138 Combine like terms: x + x = 2x 2 + 2x = 138 Solving 2 + 2x = 138 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 + 2x = 138 + -2 Combine like terms: 2 + -2 = 0 0 + 2x = 138 + -2 2x = 138 + -2 Combine like terms: 138 + -2 = 136 2x = 136 Divide each side by '2'. x = 68 Simplifying x = 68
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