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Simplifying 25x + -30x + 9 = 81 Reorder the terms: 9 + 25x + -30x = 81 Combine like terms: 25x + -30x = -5x 9 + -5x = 81 Solving 9 + -5x = 81 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -5x = 81 + -9 Combine like terms: 9 + -9 = 0 0 + -5x = 81 + -9 -5x = 81 + -9 Combine like terms: 81 + -9 = 72 -5x = 72 Divide each side by '-5'. x = -14.4 Simplifying x = -14.4
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