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Simplifying 9(9x + 9) = 4 Reorder the terms: 9(9 + 9x) = 4 (9 * 9 + 9x * 9) = 4 (81 + 81x) = 4 Solving 81 + 81x = 4 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-81' to each side of the equation. 81 + -81 + 81x = 4 + -81 Combine like terms: 81 + -81 = 0 0 + 81x = 4 + -81 81x = 4 + -81 Combine like terms: 4 + -81 = -77 81x = -77 Divide each side by '81'. x = -0.950617284 Simplifying x = -0.950617284
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