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Simplifying 9x + 3 + 3x = 30 Reorder the terms: 3 + 9x + 3x = 30 Combine like terms: 9x + 3x = 12x 3 + 12x = 30 Solving 3 + 12x = 30 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 12x = 30 + -3 Combine like terms: 3 + -3 = 0 0 + 12x = 30 + -3 12x = 30 + -3 Combine like terms: 30 + -3 = 27 12x = 27 Divide each side by '12'. x = 2.25 Simplifying x = 2.25
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