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Simplifying X + (X + 3) = 7 Reorder the terms: X + (3 + X) = 7 Remove parenthesis around (3 + X) X + 3 + X = 7 Reorder the terms: 3 + X + X = 7 Combine like terms: X + X = 2X 3 + 2X = 7 Solving 3 + 2X = 7 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 + 2X = 7 + -3 Combine like terms: 3 + -3 = 0 0 + 2X = 7 + -3 2X = 7 + -3 Combine like terms: 7 + -3 = 4 2X = 4 Divide each side by '2'. X = 2 Simplifying X = 2
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