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Simplifying 2x + (x + 3) + x = 75 Reorder the terms: 2x + (3 + x) + x = 75 Remove parenthesis around (3 + x) 2x + 3 + x + x = 75 Reorder the terms: 3 + 2x + x + x = 75 Combine like terms: 2x + x = 3x 3 + 3x + x = 75 Combine like terms: 3x + x = 4x 3 + 4x = 75 Solving 3 + 4x = 75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 4x = 75 + -3 Combine like terms: 3 + -3 = 0 0 + 4x = 75 + -3 4x = 75 + -3 Combine like terms: 75 + -3 = 72 4x = 72 Divide each side by '4'. x = 18 Simplifying x = 18
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