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Simplifying 12x + 16 = 3x + 9 Reorder the terms: 16 + 12x = 3x + 9 Reorder the terms: 16 + 12x = 9 + 3x Solving 16 + 12x = 9 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. 16 + 12x + -3x = 9 + 3x + -3x Combine like terms: 12x + -3x = 9x 16 + 9x = 9 + 3x + -3x Combine like terms: 3x + -3x = 0 16 + 9x = 9 + 0 16 + 9x = 9 Add '-16' to each side of the equation. 16 + -16 + 9x = 9 + -16 Combine like terms: 16 + -16 = 0 0 + 9x = 9 + -16 9x = 9 + -16 Combine like terms: 9 + -16 = -7 9x = -7 Divide each side by '9'. x = -0.7777777778 Simplifying x = -0.7777777778
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