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Simplifying 128 = 2x + x Combine like terms: 2x + x = 3x 128 = 3x Solving 128 = 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. 128 + -3x = 3x + -3x Combine like terms: 3x + -3x = 0 128 + -3x = 0 Add '-128' to each side of the equation. 128 + -128 + -3x = 0 + -128 Combine like terms: 128 + -128 = 0 0 + -3x = 0 + -128 -3x = 0 + -128 Combine like terms: 0 + -128 = -128 -3x = -128 Divide each side by '-3'. x = 42.66666667 Simplifying x = 42.66666667
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