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Simplifying 4x + 5x + -20 = 440 Reorder the terms: -20 + 4x + 5x = 440 Combine like terms: 4x + 5x = 9x -20 + 9x = 440 Solving -20 + 9x = 440 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + 9x = 440 + 20 Combine like terms: -20 + 20 = 0 0 + 9x = 440 + 20 9x = 440 + 20 Combine like terms: 440 + 20 = 460 9x = 460 Divide each side by '9'. x = 51.11111111 Simplifying x = 51.11111111
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