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Simplifying (x + 9)[2] = -4 Reorder the terms: (9 + x)[2] = -4 Reorder the terms for easier multiplication: 2(9 + x) = -4 (9 * 2 + x * 2) = -4 (18 + 2x) = -4 Solving 18 + 2x = -4 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + 2x = -4 + -18 Combine like terms: 18 + -18 = 0 0 + 2x = -4 + -18 2x = -4 + -18 Combine like terms: -4 + -18 = -22 2x = -22 Divide each side by '2'. x = -11 Simplifying x = -11
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