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Simplifying 7x = 5(4x + 9) Reorder the terms: 7x = 5(9 + 4x) 7x = (9 * 5 + 4x * 5) 7x = (45 + 20x) Solving 7x = 45 + 20x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20x' to each side of the equation. 7x + -20x = 45 + 20x + -20x Combine like terms: 7x + -20x = -13x -13x = 45 + 20x + -20x Combine like terms: 20x + -20x = 0 -13x = 45 + 0 -13x = 45 Divide each side by '-13'. x = -3.461538462 Simplifying x = -3.461538462
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