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Simplifying x + 3(x + 2) = 18 Reorder the terms: x + 3(2 + x) = 18 x + (2 * 3 + x * 3) = 18 x + (6 + 3x) = 18 Reorder the terms: 6 + x + 3x = 18 Combine like terms: x + 3x = 4x 6 + 4x = 18 Solving 6 + 4x = 18 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + 4x = 18 + -6 Combine like terms: 6 + -6 = 0 0 + 4x = 18 + -6 4x = 18 + -6 Combine like terms: 18 + -6 = 12 4x = 12 Divide each side by '4'. x = 3 Simplifying x = 3
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