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Simplifying x + 3 + 2x + -2 = 128 Reorder the terms: 3 + -2 + x + 2x = 128 Combine like terms: 3 + -2 = 1 1 + x + 2x = 128 Combine like terms: x + 2x = 3x 1 + 3x = 128 Solving 1 + 3x = 128 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 3x = 128 + -1 Combine like terms: 1 + -1 = 0 0 + 3x = 128 + -1 3x = 128 + -1 Combine like terms: 128 + -1 = 127 3x = 127 Divide each side by '3'. x = 42.33333333 Simplifying x = 42.33333333
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