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Simplifying 3(X + 45) = 126 Reorder the terms: 3(45 + X) = 126 (45 * 3 + X * 3) = 126 (135 + 3X) = 126 Solving 135 + 3X = 126 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-135' to each side of the equation. 135 + -135 + 3X = 126 + -135 Combine like terms: 135 + -135 = 0 0 + 3X = 126 + -135 3X = 126 + -135 Combine like terms: 126 + -135 = -9 3X = -9 Divide each side by '3'. X = -3 Simplifying X = -3
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