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Simplifying 400(x + 200) = 900 Reorder the terms: 400(200 + x) = 900 (200 * 400 + x * 400) = 900 (80000 + 400x) = 900 Solving 80000 + 400x = 900 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-80000' to each side of the equation. 80000 + -80000 + 400x = 900 + -80000 Combine like terms: 80000 + -80000 = 0 0 + 400x = 900 + -80000 400x = 900 + -80000 Combine like terms: 900 + -80000 = -79100 400x = -79100 Divide each side by '400'. x = -197.75 Simplifying x = -197.75
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