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Simplifying 4 + 2[x + 1] = 12 Reorder the terms: 4 + 2[1 + x] = 12 4 + [1 * 2 + x * 2] = 12 4 + [2 + 2x] = 12 Combine like terms: 4 + 2 = 6 6 + 2x = 12 Solving 6 + 2x = 12 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 + 2x = 12 + -6 Combine like terms: 6 + -6 = 0 0 + 2x = 12 + -6 2x = 12 + -6 Combine like terms: 12 + -6 = 6 2x = 6 Divide each side by '2'. x = 3 Simplifying x = 3
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