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Simplifying 400x = 100x + 12000 Reorder the terms: 400x = 12000 + 100x Solving 400x = 12000 + 100x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-100x' to each side of the equation. 400x + -100x = 12000 + 100x + -100x Combine like terms: 400x + -100x = 300x 300x = 12000 + 100x + -100x Combine like terms: 100x + -100x = 0 300x = 12000 + 0 300x = 12000 Divide each side by '300'. x = 40 Simplifying x = 40
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